#include <stdio.h> int main(int argc, char *argv[]) { int sum = 0; for(int i = 1; i <= 100; i++) { sum += i; } printf("%d\n", sum); return 0; }
for(s=100,n=99;n>=0;n=n-1) s=s+n;
#include <stdio.h> main() { int s=0,n; for(n=100;n>0;n--) s=s+n; printf("100+99+......+1=%d\n",s); }
#include <stdio.h> main() { int s=(100+1)*100/2; printf("100+99+......+1=%d\n",s); }