#include "stdio.h"
int main(int argc,char *argv[]){
int x,n;
double y;
printf("Please enter x(int x>0)...\nx=");
if(scanf("%d",&x)!=1 || x<1){
printf("Input error, exit...\n");
return 0;
}
for(y=1.0,n=2;n<101;n++)
y += n&1 ? x/(n+0.0) : -x/(n+0.0);
printf("The result is %g\n",y);
return 0;
}
运行样例:
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