C Program to Add Two Numbers Given by User and Display Sum

#include<stdio.h>
#include<conio.h>

int main()
{
	int a, b, sum; /* Variables Declaration */
	printf("Enter the value of a: ");
	scanf("%d", &a); /* Reading First Number */
	printf("Enter the value of b: ");
	scanf("%d", &b); /* Reading Second Number */
	sum = a + b; /* Finding Sum */
	printf("Sum of %d and %d is %d.",a,b,sum);
	getch(); /* Holds the output */
	return 0;
}
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Note: If you are using compiler other than Turbo C then you do not need clrscr(), getch() and #include<conio.h>
 Output of the above program :

Enter the value of a: 13 ↲
Enter the value of b: 33 ↲
Sum of 13 and 33 is 46.

Note: ↲ indicates ENTER is pressed.