C语言程序编程设计题

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;
}

#include <stdio.h>
#include <string.h>
#include <stdlib.h>



float fun(float num){
    int n = 1;
    float t=1, result;
    while(fabs(t)>=num){
        result = result + t;
        n=n+1;
        t=1/pow(n,2);
    }
    return result;
}
int main(){
    float n1,n2;
    n1=0.000001;
    n2=fun(n1);
    printf("%6.6f",n2);
    return 0;
}

sum=1/（n*n）；
n-=1；
当n小于1时跳出循环