题解 | #学生基本信息输入输出#四舍五入

#include <stdio.h>
int main()
{
    int a,x;
    double b,c,d;
    scanf("%d;%lf,%lf,%lf",&a,&b,&c,&d);
    x=(int)(b*1000)%10;
    if(x>=5)
    {
        double y;
        y=(int)((b+0.01)*100)/100.0;
        printf("The each subject score of  No. %d is %.2lf, %.2lf, %.2lf.",a,y,c,d);
    }
    else
    {
        double z;
        z=(int)(b*100)/100.0;
        printf("The each subject score of  No. %d is %.2lf, %.2lf, %.2lf.",a,z,c,d);
    }
    return 0;
}