c语言求幂级数展开的部分和

Question

Answer 1

#include <stdio.h>
int main() {
    int n;
    double x,sx,sn,s=0,i;
    printf("n=");
    scanf("%d",&n);
    printf("x=");
    scanf("%lf",&x);
    sx=1;
    sn=1;
    for(i=1;i<=n;i++){
        sx=(-1)*sx*x;
        sn=sn*i;
        s+=sx/sn;
    }
    printf("sum=%.3lf",s);   
    return 0;
}

觉得有用的话采纳一下哈