今天打算測試一下各種C++ 輸出是否正常, 程式如下:
#include <iostream>
using namespace std;
int main() {
int num;
string str;
cout << "Input a number: ";
cin >> num;
cout << num;
cout << "Input a string: ";
getline(cin, str);
cout << str;
return 0;
}
一條極其簡單的程式, 竟然在 getline(cin, str); 出錯, 有無大神可以解釋一下?
(在執行 cout << "input a string: "; 後, 系統會跳過後面程式)
C++ string 輸出問題?
2020-05-14 9:27 pm
回答 (1)
2020-05-15 10:46 pm
你的cin中有'\n'，getline讀到'\n'就會結束，所以要清掉'\n'。
cin>>ws;
或
cin.ignore(256,'\n');
cin>>ws;
或
cin.ignore(256,'\n');
參考: cin and getline skipping input
https://stackoverflow.com/questions/10553597/cin-and-getline-skipping-input
std::ws
https://www.cplusplus.com/reference/istream/ws/
std::istream::ignore
https://www.cplusplus.com/reference/istream/istream/ignore/
收錄日期: 2021-04-24 10:39:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200514132708AAgSoMC