有关类的编程

Question

#include <iostream>#include <string>using namespace std;void main(){ struct student {  int num;  char name[20];        float score1;  float score2;  float score3; }stu[5]; int i; float sum1=0,sum2=0,sum3=0; cout<<"请输入五个学生的信息（按学号，姓名，三门成绩的顺序）"<<endl; for(i=0;i<5;i++)    cin>>stu[i].num>>stu[i].name>>stu[i].score1;    cin>>stu[i].score2>>stu[i].score3>>endl; for(i=0;i<5;i++) {  sum1=stu[i].score1;    sum2=stu[i].score2;    sum3=stu[i].score3; } sum1=sum1/5; sum2=sum2/5; sum3=sum3/5; cout<<"每门的平均分为"<<endl; cout<<"第一门："<<sum1<<" "<<"第二门："<<sum2<<" "<<"第三门："<<sum3<<endl;}为什么会出现：error C2679: binary '>>' : no operator defined which takes a right-hand operand of type '' (or there is no acceptable conversion)

Answer 1

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