對任何錯誤修正：二進制「>>」沒有操作員發現

Question

我不斷收到

binary ">>" no operator found which takes a right-hand operand of type "type" (or there is no acceptable conversion) or error code C2679.

我嘗試添加#include <string>也沒有爲我工作。

這裏是我有任何幫助，將不勝感激

#include<iostream> 
#include <iomanip> 

using namespace std; 

int main() 
{ 
    cout << setprecision(2) << fixed; 
    string fname, sname, tname; 
    float bill, tip; 
    cout << "Enter first friend name: "; 
    cin >> fname; 
    cout << "\nEnter second friend name: "; 
    cin >> sname; 
    cout << "\nEnter third friend name: "; 
    cin >> tname; 
    cout << "\nEnter amount of bill: $"; 
    cin >> bill; 
    tip = 0.15*bill; 
    cout << "\n\nTip amount:\t$" << tip; 
    cout << "\nTotal bill:\t$" << tip + bill; 
    cout << "\n\n" << fname << ":\t$" << (tip + bill)/3; 
    cout << "\n" << sname << ":\t$" << (tip + bill)/3; 
    cout << "\n" << tname << ":\t$" << (tip + bill)/3; 
    return 0; 
} 

Answer 1

你缺少一個包含文件的代碼。

#include <string>