使用for语句计算第200个三角数。

#include <stdio.h>

int main (void)
{
    int n, triangularNumber;

    triangularNumber = 0;

    for (n = 1; n <= 200; n = n + 1)
        triangularNumber = triangularNumber + n;

    printf ("The 200th triangular number is %i/n", triangularNumber);

    return 0;
}