如何用void函數讀取名字和姓氏

Question

我可以很容易地創建一個void函數來輸出類似標題的東西，但是我不能讓程序讀取用戶的輸入並輸出給他們。

即。有一個程序說「請輸入您的名字」，然後輸出「您輸入：（他們把什麼）」

什麼，我有一個例子：

#include<iostream> 
#include<conio.h> 
#include<iomanip> 
#include<fstream> 

using namespace std; 

void namefn()//namefn prototype 

int main(){ 
    string firstName,lastName; 
    return 0; 
} 

void namefn(string firstName, string lastName){ 
    cout<<"please enter your first and last name "<<endl; 
} 

Answer 1

使用cin閱讀，是iostream 。

即

cin >> firstName; 

Answer 2

cout << "enter your first and last name:"; 
cin >> firstName >> lastName; 
cout << firstName << " " << lastName; 

，如果你希望程序分別顯示姓氏和名字，那麼這樣的：

cout << "enter you first name:"; 
cin >> firstName; 
cout << firstName << endl; 
cout << "Enter your last name:"; 
cin >> lastName; 
cout << lastName << endl; 

Answer 3

試試這個：

#include <iostream> 
#include <string> 

void displayFirstAndLast(const std::string& firstName, const std::string& lastName) 
{ 
    std::cout << "You are " << firstName << " " << lastName << std::endl; 
} 


int main(){ 
    std::string firstName; 
    std::string lastName; 
    std::cout << "Please enter your first and last name " << std::endl; 
    std::cin >> firstName >> lastName; 
    displayFirstAndLast(firstName, lastName); 
    return 0; 
} 

我想想，你想要這樣的東西。

或用類似「頭」

#include <iostream> 
#include <string> 

void displayFirstAndLast(const std::string& firstName, const std::string& lastName); 

int main(){ 
    std::string firstName; 
    std::string lastName; 
    std::cout << "Please enter your first and last name " << std::endl; 
    std::cin >> firstName >> lastName; 
    displayFirstAndLast(firstName, lastName); 
    return 0; 
} 

void displayFirstAndLast(const std::string& firstName, const std::string& lastName) 
{ 
    std::cout << "You are " << firstName << " " << lastName << std::endl; 
}