c语言题目 急求今晚内要

Question

c++的 求1/1！-1/2！+1/3！-1/4！……1/10！的和。用函数实现

Answer 1

#include <stdio.h>

double func(int n)
{
    int p = 1;
    for (int i = 2; i <= n; i++) p *= i;
    if (n % 2 == 1)
        return 1.0 / p;
    else
        return -1.0 / p;
}

int main()
{
    double sum = 0;
    for (int i = 1; i <= 10; i++)
        sum += func(i);
    printf("%lf\n", sum);
    return 0;
}

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