Basic C programs for beginners

Question 1.Program to Display "HelloWorld"

#include <stdio.h>

#include <conio.h>

void main()

{

  clrscr();

  printf("Hello World");

 getch();

}

Question 2. Addition of Two Number

#include <stdio.h>

#include <conio.h>

void main()

{

    int fstNo, secNo;

      clrscr();

     printf("Enter two Nubers:\n");

      scanf("%d%d", &fstNo, &secNo);

     printf("Addition is :%d",(fstNo+ secNo));

      getch();

}

Question 3.Write a program to display ASCII Value of a character

#include <stdio.h>

#include <conio.h>

void main()

{

  char ch;

    clrscr();

    printf("Enter a character:\n");

    scanf("%c", &ch); 

    printf("ASCII value is %d", ch);

   getch();

}

Question 4.Program to find Quotient and Remainder

#include <stdio.h>

#include <conio.h>

void main()

{

clrscr();

int a, b;

printf("Enter a:\n ");

scanf("%d", &a);

 printf("Enter b:\n ");

 scanf("%d", &b);

printf("Quotient = %d\n",a/b);

  printf("Remainder = %d", a%b);

    getch();

}

Question 5.Calculate Area of Circle

#include <stdio.h>

#include <conio.h>

void main()

{

    clrscr();

   float r;

 printf("Enter the radius of Circle : \n");

 scanf("%f", &r);

 printf("\nArea of Circle : %f",3.14 * r * r);

 getch();

}

Question 6. Calculate Area of Square

#include <stdio.h>

#include <conio.h>

void main()

{

 clrscr();

 int side;

   printf("\nEnter the Length of Side : ");

   scanf("%d", &side);

 printf("\nArea of Square : %d",side*side);

getch();

}

Question 7.Compute Area of Rectangle

#include <stdio.h>

#include <conio.h>

void main()

{

 clrscr();

    int length, breadth;

 printf("Enter the Length of Rectangle : \n");

  scanf("%d", &length);

  printf("Enter the Breadth of Rectangle : \n");

 scanf("%d", &breadth);

printf("Area of Rectangle : %d\n", length * breadth);

  getch();

}

Question 8.Calculate Simple Interest

#include <stdio.h> #include <conio.h> void main() {   clrscr();  int Principal, rate, time, si;    printf("\nEnter Principal Amount : ");    scanf("%d",&Principal);    printf("\nEnter Rate of Interest : ");    scanf("%d", &rate);    printf("\nEnter Period of Time   : ");    scanf("%d", &time);    si = (Principal * rate * time) / 100;    printf("Simple Interest : %d\n", si); getch(); }

Question 9.Calculate total and average marks of 4 subjects

#include <stdio.h>

#include <conio.h>

void main()

{

  clrscr();

   int s1, s2, s3, s4,sum;

   float avg;

   printf("\nEnter marks of 4 subjects : ");

   scanf("%d%d%d%d", &s1, &s2, &s3, &s4);

  sum = s1 + s2 + s3 + s4;

 printf("Sum : %d\n",sum);

 avg = sum / 4;

printf("\nAverage: %f\n", avg);

getch();

}

Question 10.Print Student Details

#include <stdio.h>

#include <conio.h>

void main()

{

  clrscr();

   char name[12];

   int age;

   float marks;

   printf("\nEnter Student Details ");

   scanf("%s%d%f", &name, &age, & marks);

  printf(“Student Details are : %s\n%d\n%f", name,age,marks);

   getch();

}

Question 11.Calculate Area of triangle

#include <stdio.h>

#include <conio.h>

void main()

{

    clrscr();

   float b,h;

 printf("Enter base \n");

 scanf("%f", &b);

printf("Enter height \n");

scanf("%f", &h);

 printf("\n Area of triangle : %f",0.5 * b* h);

 getch();

}