#include<stdio.h>
int main(){
printf("\n\n%d,%d\n",20/7,-20/7);
printf("%f,%f\n",20.0/7,-20.0/7);
return 0;
}
#include<stdio.h>
int main(){
printf("\n\n%d,%d\n",20/7,-20/7);
printf("%f,%f\n",20.0/7,-20.0/7);
return 0;
}
首先%d是输出整型,不是double。double型用%lf输出。
其次两个整数相除结果是整数,所以20/7=2