cin.getline()与getline()

C++中有两个getline函数，这两个函数分别定义在不同的头文件中。

1.getline()是定义在<string>中的一个行数，用于输入一行string，以enter结束。

 

函数原型：getline(cin,str);
cin:istream类的输入流对象
str:待输入的string对象

 

 

example 1:

 //《C++ primary plus》第四章编程练习题1
 #include <iostream>
 #include <string>
 using namespace std;
 string fname;
 string lname;
 char grade;
 int age;
 int main()
 {
    cout<<"What is your first name?";
    getline(cin,fname);
    cout<<"What is your last name?";
    getline(cin,lname);
    cout<<"What letter grade do you deserve?";
    cin>>grade;
    cout<<"What is your age?";
    cin>>age;
    cout<<"Name:"<<lname<<","<<fname<<endl<<"Grade:"   <<grade<<endl<<"Age:"<<age<<endl;
    system("pause");
    return(0);
 }

 

 

 

2.cin.getline(char ch[],size)是cin 的一个成员函数，定义在<iostream>中，用于输入行指定size的字符串，以enter结束。若输入长度超出size，则不再接受后续的输入。

 

example 2:

 //《C++ primary plus》第四章编程练习题1
 #include <iostream>
 using namespace std;
 char fname[5];
 char lname[5];
 char grade;
 int age;
 int main()
 {
     cout<<"What is your first name?";
     cin.getline(fname,5);
     cout<<"What is your last name?";
     cin.getline(lname,5);
     cout<<"What letter grade do you deserve?";
     cin>>grade;
     cout<<"What is your age?";
     cin>>age;
     cout<<"Name:"<<lname<<","<<fname<<endl<<"Grade:"<<grade<<endl<<"Age:"<<age<<endl;
     system("pause");
     return(0);
 }