C Programming Entire Topics Practice
Topics-01 : Overview of C
Problem – 01
Printing “Hello World!”.
#include <stdio.h>
int main() {
printf("Hello World!");
return 0; }
Problem – 02
Printing two sentences on two different lines. (Using of \n)
#include <stdio.h>
int main() {
printf("Hello\nWorld!");
return 0; }
Problem – 03
Print a line in a quotation mark (For example: “Hello World”.)
#include <stdio.h>
int main() {
printf("\"Hello World!\"");
return 0; }
Topics-02 : Data Types and Variables
Problem – 01
Taking 2 integer numbers as input and then add, subtract, multiply and divide them. Finally print the output results.
#include <stdio.h>
int main() {
float a, b, sum, sub, mul, dev;
printf("Enter First number: ");
scanf("%f", &a);
printf("Enter Second number: ");
scanf("%f", &b);
sum=a+b;
sub=a-b;
mul=a*b;
dev=a/b;
printf("The Two Number Addition is: %.4f\n", sum);
printf("The Two Number Substrction is: %.4f\n", sub);
printf("The Two Number Multification is: %.4f\n", mul);
printf("The Two Number Divided is: %.4f\n", dev);
return 0; }
Problem – 02
Taking 3 float numbers and calculating the average of them.
#include <stdio.h>
int main() {
float a,b,c, avr;
printf("Enter Three number: ");
scanf("%f %f %f", &a, &b, &c);
avr=(a+b+c)/3;
printf("The Floating Average Number is: %.4f\n", avr);
return 0; }
Problem – 03
The length & breadth of a rectangle are input through the keyboard. Find out the rectangle’s area.
#include <stdio.h>
int main() {
float lenth, breadth, area;
printf("Enter First number: ");
scanf("%f", &lenth);
printf("Enter Second number: ");
scanf("%f", &breadth);
area = lenth*breadth;
printf("The Rectangular Area is: %.4f\n", area);
return 0; }
Problem – 04
Temperature of a city in Fahrenheit degrees is input through the keyboard. Write a program to convert this temperature into Centigrade degrees. fahrenheit=(celcius*9/5)+32
#include <stdio.h>
int main() {
float C,F;
printf("Enter Fahrenheit Value: ");
scanf("%f", &F);
C = (F-32)/1.8;
printf("The Centigrade Value : %.2f \n", C);
return 0; }
Problem – 05
The distance between Mirpur and Ashulia is input through the keyboard in meters. Write a program to convert and print this distance in feet, inches and centimeters. 1 meter=100 cm 1 meter=39.37 inch 1 meter=3.21 feet
#include <stdio.h>
int main() {
float distance, vulue_cm, vulue_inch, vulue_feet;
printf("Enter The Distanc Mirpur and Ashulia at Meter: ");
scanf("%f", &distance);
vulue_cm = distance*100;
vulue_inch = distance*39.37;
vulue_feet = distance*3.21;
printf("The Value at cm is: %.2f cm\n",vulue_cm );
printf("The Value at inch is: %.2f inch\n",vulue_inch );
printf("The Value at feet is: %.2f feet\n",vulue_feet );
return 0; }
Problem – 06
Niloys basic salary is input through the keyboard. His dearness allowance is 40% of his basic salary and house rent is 20% of his basic salary. Write a program to calculate his gross salary. gross_salary=basic_salary+dearness_allowence+house_rent.
#include <stdio.h>
int main() {
float salary, basic_salary, house_rant,total_sarary;
printf("Enter Your Salary: ");
scanf("%f", &salary);
basic_salary = salary*.2;
house_rant = salary*.4;
total_sarary = salary + basic_salary+house_rant;
printf("Total Salary = %f",total_sarary);
return 0; }
Problem – 07
If the marks obtained by a student in five different subjects are input through the keyboard, find out the aggregate marks and average marks obtained by the student. Assume that the maximum marks that can be obtained by a student in each subject is 100.
#include <stdio.h>
int main() {
float sub1, sub2, sub3, sub4, sub5;
printf("Enter marks for Subject 1: ");
scanf("%f", &sub1);
printf("Enter marks for Subject 2: ");
scanf("%f", &sub2);
printf("Enter marks for Subject 3: ");
scanf("%f", &sub3);
printf("Enter marks for Subject 4: ");
scanf("%f", &sub4);
printf("Enter marks for Subject 5: ");
scanf("%f", &sub5);
float aggregateMarks = sub1 + sub2 + sub3 + sub4 + sub5;
float averageMarks = (float)aggregateMarks / 5;
printf("Aggregate Marks: %.2f\n", aggregateMarks);
printf("Average Marks: %.2f\n", averageMarks);
return 0; }
Problem – 08
Printing a character with its ASCII value.
#include <stdio.h>
int main() {
char ch;
printf("Enter any character : ");
scanf("%c", &ch);
printf("The ASCII value is : %d \n",ch);
return 0; }
Problem – 09
Beecrowd Problem 1001 https://www.beecrowd.com.br/judge/en/problems/view/1001
#include <stdio.h>
int main() {
int A, B, X;
scanf("%d %d", &A,&B);
X = A + B;
printf("X = %d\n", X);
return 0;}
Problem – 10
Beecrowd Problem 1002 https://www.beecrowd.com.br/judge/en/problems/view/1002
#include <stdio.h>
int main() {
double pi = 3.14159;
double R, area;
scanf("%lf", &R);
area = pi * R * R;
printf("A=%.4lf\n", area);
return 0;}
Topics-03 : Operator and Expression
Problem – 01
#include <stdio.h>
int main() {
int a, b;
printf("Enter a Number: ");
scanf("%d", &a);
(a%2==0)? printf("Even"):printf("Odd");
return 0; }
Problem – 02
#include <stdio.h>
int main() {
int num1,num2,num3,largest;
printf("Enter Three iInteger Number: ");
scanf("%d %d %d",&num1,&num2,&num3);
largest = (num1 > num2 && num1 > num3)? num1 : (num2 > num3)? num2 : num3;
printf("The Largest number is : %d\n", largest);
return 0; }
Problem – 03
#include <stdio.h>
int main() {
char ch;
printf("Enter any character: ");
scanf("%c", &ch);
(ch>='a' && ch<='z') || (ch>='A' && ch<='Z')
? printf("It is ALPHABET")
: printf("It is NOT ALPHABET");
return 0; }
Problem – 04
#include <stdio.h>
int main() {
float salary, bonus, commission, price, sold, total_sarary;
salary=1500.00;
printf("Enter Each Computer Price: ");
scanf("%f", &price);
printf("Enter Total Computer Sold: ");
scanf(“%f”, &sold);
bonus = price*200;
commission = price*sold*.2;
total_sarary = salary + bonus + commission;
printf("Total Salary = %f\n",total_sarary);
return 0; }
Problem – 05
#include <stdio.h>
int main () {
float a, b, price;
printf("Enter 15 item Price: ");
scanf("%f", &a);
printf("Enter 15 item Profit: ");
scanf("%f", &b);
price=(a-b)/15;
printf("Cost of Each Product Price = %.2f", price);
return 0; }
Problem – 06
Beecrowd Problem 1007
#include <stdio.h>
int main() {
int A, B, C, D;
int difference;
scanf("%d %d %d %d", &A, &B, &C, &D);
difference = (A * B) - (C * D);
printf("DIFERENCA = %d\n", difference);
return 0; }
Problem – 07
Beecrowd Problem 1008
#include <stdio.h>
int main () {
int NUMBER,hours;
float amount,SALARY;
scanf("%d %d %f", &NUMBER, &hours, &amount);
SALARY = hours * amount;
printf("NUMBER = %d\n",NUMBER);
printf("SALARY = U$ %0.2f\n", SALARY);
return 0; }
Problem – 28
#include <stdio.h>
int factorial (int n) {
if (n == 0 || n == 1)
return 1;
else
return n * factorial (n - 1); }
int main() {
int number;
printf("Enter a number to find its factorial: ");
scanf("%d", &number);
if (number < 0) {
printf("Factorial is not defined for negative numbers.\n");
} else {
int result = factorial (number);
printf("Factorial of %d is: %d\n", number, result); }
return 0; }
Problem – 29
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 30
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 31
#include <stdio.h>
int main() {
int num;
printf ("Enter an integer: ");
scanf("%d", &num);
if(num % 2 == 0)
printf("%d is an even number.", num);
else
printf("%d is a odd number.", num);
return 0; }
Problem – 32
#include <stdio.h>
int main() {
char ch;
printf("Enter any character: ");
scanf("%c", &ch);
if ((ch>='a' && ch<='z') || (ch>='A' && ch<='Z'))
printf("This is an ALPHABET\n");
else
printf("This is NOT an ALPHABET\n");
return 0; }
Problem – 33
#include <stdio.h>
int main() {
float a, b, c;
printf ("Enter three angles of any triangle: ");
scanf("%f %f %f", &a, &b, &c);
if(a+b+c==180)
printf("This is a Triangle.");
else
printf("This is not a Triangle.");
return 0; }
Problem – 34
#include<stdio.h>
int main() {
int year;
printf("Enter any year: ");
scanf("%d",&year);
if(year%400==0){
printf("It is a leap year = %d",year);
} else if(year%4==0 && year%100!=0){
printf("It is a leap year = %d",year);
} else printf("It is not a leap year");
return 0; }
Problem – 35
#include <stdio.h>
int main() {
int alif, fahmid, joy;
printf("Enter the age of Alif: ");
scanf("%d", &alif);
printf("Enter the age of Fahmid: ");
scanf("%d", &fahmid);
printf("Enter the age of Joy: ");
scanf("%d", &joy);
if (alif < fahmid && alif < joy)
printf("Alif is the youngest person.\n");
else if (fahmid < joy)
printf("Fahmid is the youngest person.\n");
else
printf("Joy is the youngest person.\n");
return 0; }
Problem – 36
#include<stdio.h>
int main(){
float c, p, b, m, co, avr_marks;
printf("Enter your chemistry marks: ");
scanf("%f", &c);
printf("Enter your physics marks: ");
scanf("%f", &p);
printf("Enter your biology marks: ");
scanf("%f", &b);
printf("Enter your mathematics marks: ");
scanf("%f", &m);
printf("Enter your computer marks: ");
scanf("%f", &co);
avr_marks = ((c+p+b+m+co)*100)/500;
if(avr_marks >=90)
printf("Grade A");
else if(avr_marks >=80)
printf("Grade B");
else if(avr_marks >=70)
printf("Grade C");
else if(avr_marks >=60)
printf("Grade D");
else if(avr_marks >=40)
printf("Grade E");
else if(avr_marks <40)
printf("Grade F");
else
printf ("Please Enter Your Subject Number.\n");
return 0; }
Problem – 37
#include <stdio.h>
int main() {
int cus;
float units, bill;
printf("Enter Customer Id Number: ");
scanf("%d",&cus);
printf("Enter Total Customer Units: ");
scanf("%f", &units);
if(units <= 200)
bill = 0.50 * units;
else if(units >= 201 && units <= 400)
bill = 100 + 0.65 * (units - 200);
else if(units >= 401 && units <= 600)
bill = 230 + 0.85 * (units - 400);
else
bill = 390 + 1.00 * (units - 600);
printf("\n Customer Number = %d", cus);
printf("\n Units consumed = %.2f", units);
printf("\n Bill = %.2f", bill);
return 0; }
Problem – 38
#include <stdio.h>
int main() {
char operator;
double a, b;
printf("Enter Any Opearator (+, -, *, /) : ");
scanf("%c", &operator);
printf("Enter Your First Number: ");
scanf("%lf", &a);
printf("Enter Your Second Number: ");
scanf("%lf", &b);
switch (operator){
case'+':
printf("\nAddition : %.2lf + %.2lf = %.2lf", a, b, a+b);
break;
case'-':
printf("\nSubstruction : %.2lf - %.2lf = %.2lf", a, b, a-b);
break;
case'*':
printf("\nMultification : %.2lf * %.2lf = %.2lf", a, b, a*b);
break;
case'/':
if(b==0)
printf("\nSecond value is 0. So, The divided value is undefine");
else
printf("\nDivided : %.2lf / %.2lf = %.2lf", a, b, a/b);
break; }
return 0; }
Problem – 39
#include <stdio.h>
int main() {
int X, Y;
float price = 0;
scanf("%d %d", &X, &Y);
if (X == 1) {
price = (float) (4.00 * Y); }
else if (X == 2) {
price = (float) (4.50 * Y); }
else if (X == 3) {
price = (float) (5.00 * Y); }
else if (X == 4) {
price = (float) (2.00 * Y); }
else if (X == 5) {
price = (float) (1.50 * Y); }
printf("Total: R$ %.2f\n", price);
return 0; }
Problem – 40
#include <stdio.h>
int main() {
int num_a, num_b;
scanf("%d %d", &num_a, &num_b);
if (num_b % num_a == 0 || num_a % num_b == 0) {
printf("Sao Multiplos\n");
} else {
printf("Nao sao Multiplos\n"); }
return 0; }
Problem – 41
#include <stdio.h>
int main() {
int i;
for(i=2; i<=100; i=i+2) {
printf("%d\n",i); }
return 0; }
Problem – 42
#include <stdio.h>
int main() {
int a,sum=0;
for (a =2; a<=10; a+=2) {
sum += a; }
printf("The sum of the even numbers from 1 to 10 is: %d \n", sum);
return 0; }
Problem – 43
#include <stdio.h>
int main() {
int number;
int sum = 0;
printf("Enter a five-digit number: ");
scanf("%d", &number);
if (number < 10000 || number > 99999) {
printf("Invalid input. Please enter a five-digit number.\n"); }
while (number > 0) {
sum += number % 10;
number /= 10; }
printf("The sum of the digits of the entered number is: %d\n", sum);
return 0; }
Problem – 44
#include <stdio.h>
int main( ) {
int number, reverse=0, remainder, num;
printf("Enter a 5 digit number: ");
scanf("%d", &number);
if (number < 10000 || number > 99999) {
printf("Invalid input. Please enter a five-digit number.\n"); }
num=number;
while (num>0) {
remainder=num%10;
reverse=reverse*10+remainder;
num=num/10;}
printf("Reverse number is %d \n", reverse);
if(number == reverse)
printf("Reverse number is equal to actual number.\n");
else
printf("Reverse number is not equal to actual number.\n");
return 0; }
Problem – 45
#include <stdio.h>
int main(){
int a, b = 1, num;
printf("Input the number : ");
scanf("%d", &num);
for(a = 1; a <= num; a++)
b = b * a;
printf("The Factorial of %d is: %d\n", num, b);
return 0; }
Problem – 46
#include <stdio.h>
int main() {
int low, high, a, b;
printf("Enter two low and high numbers: ");
scanf("%d %d", &low, &high);
printf("Prime numbers between %d and %d are: \n", low, high);
while (low < high) {
b = 0;
if (low <= 1) {
++low;
continue;}
for (a = 2; a <= low / 2; ++a) {
if (low % a == 0) {
b = 1;
break; } }
if (b == 0)
printf("%d ", low);
++low; }
return 0; }
Problem – 47
#include <stdio.h>
int main() {
int n, i, flag = 0;
printf("Enter a positive or negative integer number: ");
scanf("%d", &n);
if (n == 0 || n == 1)
flag = 1;
for (i = 2; i <= n / 2; ++i) {
if (n % i == 0) {
flag = 1;
break;}}
if (flag == 0)
printf("%d is a prime number.", n);
else
printf("%d is not a prime number.", n);
return 0;}
Problem – 48
#include <stdio.h>
int main() {
int i, n;
int t1 = 0, t2 = 1;
int nextTerm = t1 + t2;
printf("Enter the number of terms: ");
scanf("%d", &n);
printf("Fibonacci Series: %d, %d, ", t1, t2);
for (i = 3; i <= n; ++i) {
printf("%d, ", nextTerm);
t1 = t2;
t2 = nextTerm;
nextTerm = t1 + t2;}
return 0; }
Problem – 49
#include<stdio.h>
int main() {
float x;
int i,sum=0;
for(i=1;i<=6;i++){
scanf("%f",&x);
if(x>0){
sum=sum+1; } }
printf("%d valores positivos\n",sum);
return 0; }
Problem – 50
#include <stdio.h>
int main() {
int a,b;
for (a = 1; a <= 4; a++) {
for (int b = a; b >=1; b--) {
printf(" %d ", b); }
printf("\n"); }
return 0; }
Problem – 51
#include <stdio.h>
int main(){
int a[5],b;
printf("Enter 5 Numbers: ");
for(b=0;b<5;b++)
scanf("%d",&a[b]);
printf("Odd Numbers in Array are: ");
for(b=0;b<5;b++)
if(a[b]%2!=0)
printf("%d ",a[b]);
return 0;}
Problem – 52
#include<stdio.h>
int main() {
int a[5],b,sum=0;
printf("Enter 5 even and odd number: ");
for(b=0; b<5; b++)
scanf("%d",&a[b]);
for(b=0; b<5; b++) {
if(a[b]%2==0)
sum=sum+a[b]; }
printf("Total Sum of Even values is: %d ",sum);
return 0; }
Problem – 43
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 44
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 45
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 46
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 47
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 48
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 49
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 50
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 41
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 42
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 43
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 44
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 45
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 46
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 47
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 48
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 49
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 50
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 41
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 42
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 43
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 44
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 45
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 46
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 47
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 48
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 49
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 50
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 41
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 42
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 43
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 44
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 45
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 46
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 47
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 48
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 49
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 50
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 41
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 42
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 43
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 44
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 45
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 46
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 47
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 48
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 49
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Problem – 50
#include <stdio.h>
int main() {
printf("Md Jakaria Nur!\n");
return 0; }
Thank You!
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