程序代码：

void fmin(struct stu student[],int all)
{
    int i;
    int fminC,fminE,fminM;
    int minC_id,minE_id,minM_id;
    for(i=0;i<all;i++)
    {
        if(student[i+1].score.scoreC>student[i].score.scoreC)
        {
            fminC=student[i+1].score.scoreC;
            minC_id=i;    //取最小的i
        }
     }
}