C :

#include<stdio.h>
#include<stdlib.h>
int main ( )
	{
		int t,i;
     t=0; i=1;
		 while(i<=100)
		 { t=t+i;
		    i=i+1;
		 }
		 printf("%d\n",t);
			 return 0;
		 }

C++ :

#include<stdio.h>
int main()
{
  int number,sum;
  sum=0; number=1;
  while(number<=100)
  {
    sum=sum+number;
    number++;
  }
  printf("%d",sum);
  printf("\n");
  return 0;
}