这个函数应该如何调用啊

Question

//学号查找
void xuehao(SqList &s,char key[]){
    int count=0;
    for(int i=0;i<s.length;i++){
        s.elem[i].averscore=(s.elem[i].computerscore+s.elem[i].englishscore+s.elem[i].mathscore)/3;
    }
    for ( int i = 0; i < s.length; i++)
    {//是否匹配
        if (strcmp(s.elem[i].number,key) == 0)
        {
            printf("第%d个学生:\n学号：%s\n姓名：%s\n数学成绩：%.1lf\n英语成绩：%.1lf\n计算机成绩：%.1lf\n平均分：%.1lf\n",
                i+1,s.elem[i].number,s.elem[i].name,s.elem[i].mathscore,
                s.elem[i].englishscore, s.elem[i].computerscore, s.elem[i].averscore);
            count=1;
        }
    }
    if(count==0){
        printf("查找的学生不存在\n");
    }
}
//姓名查找
void xingming(SqList &s,char ch[]){
    int flag=0,count;
    char num[20];
    for(int i=0;i<s.length;i++){
        s.elem[i].averscore=(s.elem[i].computerscore+s.elem[i].englishscore+s.elem[i].mathscore)/3;
    }
    for ( int i = 0; i < s.length; i++)
    {
        if (strcmp(s.elem[i].name,ch) == 0)
        {
            flag = flag+1;
            count=i;
        }
    }
    //避免重名，学号不会重复
    if(flag>1){
        printf("出现重名，请输入待查找同学学号：\n");
        scanf("%s",&num);
        xuehao(s,num);
    }
    else if(flag==1){
        printf("第%d个学生:\n学号：%s\n姓名：%s\n数学成绩：%.1lf\n英语成绩：%.1lf\n计算机成绩：%.1lf\n平均分：%.1lf\n",
            count+1,s.elem[count].number,s.elem[count].name,s.elem[count].mathscore,
            s.elem[count].englishscore, s.elem[count].computerscore, s.elem[count].averscore);
    }
    else{
        printf("查找的学生不存在！\n");
    }
}

Answer 1

char key[100];
scanf("%s",key);
xuehao(sq,key);