习题4-2 求幂级数展开的部分和 (20分)

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

double getSum(int a){ //返回值要是double才行，不然x最大的时候验证不通过
    double count = 1;
    while(a>0){
        count *= a;
        a--;
    }
    return count;
}
int main(){
    double x,count = 1;
    int i = 1;
    scanf("%lf",&x);
    while(pow(x,i)/getSum(i) >= 0.00001){
        count += pow(x,i)/getSum(i);
        i++;
    }
    count += pow(x,i)/getSum(i); //最后一项的绝对值小于0.00001
    printf("%.4lf",count);
}

标签：count,20,int,double,幂级数,getSum,pow,习题,include
来源： https://blog.csdn.net/qq_40604352/article/details/104729387