分别用do-while和for循环计算1+1/2!+1/3!+···········的前20项的和

Question

如题所述

Answer 1

#include<stdio.h>
#include<stdlib.h>
int main()
{
double a=1.0,b,c=0.0;
while(a<=20){
b=1/a;
c=c+b;
a++;
}
printf("%f",c);
system("pause");
return 0;
}
可能格式不对，思路是这样的本回答被提问者采纳