im使用fgets(Learner.name，21，stdin(输入学生的名称，但是当我运行程序时，它显示了＆quot"输入您的姓名"并跳过"在5个科目中输入您的分数"。＆quot

有人可以解释我为什么会发生这种情况吗？因为cin.getline((函数相同。

get_s((函数不起作用的编译器显示＆quot;在此范围"

#include<iostream>
#include<stdio.h>
#include<cstdlib>
using namespace std;
struct Student
{
    int rollno;
    char name[21];
    float marks[5];
    char grade;
};
Student learner ;
int main()
{
    cout<<"n"<<"Enter Roll number: ";
    cin>>learner.rollno;
    cout<<"n"<<"Enter your name: ";
    fgets(learner.name,21,stdin);
    cout<<"n"<<"Enter your marks in 5 subjects: "<<"n";
    for(int i = 0;i <5;++i)
    {
        cout<<"n"<<"Subject"<<i+1<<":";
        cin>>learner.marks[i];
    }
    float avg ,total;
    total =  (learner.marks[0]+learner.marks[1]+learner.marks[2]+learner.marks[3]+learner.marks[4]);
    avg = total/5;
    if(avg<50)
        learner.grade = 'D';
    else if(avg<60)
        learner.grade = 'C';
    else if(avg<80) 
        learner.grade = 'B';
    else
        learner.grade = 'A';
    cout<<"n"<<"n"<<"Student result: n";
    cout<<"Roll Number: "<<learner.rollno<<"t";
    cout<<"Name: ";
    cout.write(learner.name,21);
    cout<<"n"<<"Total Marks: "<<total;
    cout<<"t"<<"Grade: "<<learner.grade<<endl;
    system("pause");
    return 0;
}

这是输出：

  Enter Roll number: 22
  Enter your name:
  Enter your marks in 5 subjects:
  Subject1: