题解 | 取近似值

#include <stdio.h>

int main() {
    double x;
    int i;
    double xiaoshu;
    scanf("%lf",&x);
    for(i = 0;i <= 20;i++){
        if(i <= x && i + 1 > x){
            xiaoshu = x - i;
            if(xiaoshu < 0.5){
                printf("%d",i);
            }else{
                printf("%d",i+1);
            }
        }
    }
    return 0;
}