This Program will give basic data type of c and perform sum of this three number.
#include<stdio.h>
void main()
{
int no1,no2,no3,sum;
printf("\n\tEnter First Number ");
scanf("%d",&no1);
printf("\n\tEnter Second Number ");
scanf("%d",&no2);
printf("\n\tEnter Third Number ");
scanf("%d",&no3);
sum=no1+no2+no3;
printf("\n\t_____________________________________________");
printf("\n\n\tSum Of %d, %d And %d Is %d\n\n",no1,no2,no2,sum);
}