C语言程序编程设计题

Question

Answer 1

代码如下：

#include <stdio.h>
int main()
{
    float ex = 0.000001;
    float sum = 0.0;
    float t =1;
    int i = 1;
    while(t > ex)
    {
        t = 1.0/(i*i);
        sum += t;
        i++;
    }
    printf("和=%f\n",sum);
    return 0;
}