[C ++]与switch（）语句有关 [英] [C++] issues with switch() statement

问题描述

我正在尝试使用 switch（）创建一个菜单。但是，编译器不断向我抛出错误，如'const char *'无效转换为'char'[-fpermissive] 。以下是代码：

I am trying to create a menu using switch(). However, the compiler keeps throwing me errors like invalid conversion of 'const char*' to 'char' [-fpermissive]. Here is the code:

void info::get_factorio_version(string* factorio_version){
    bool loop = true;
    while(loop){
    cout << "What version of Factorio is this mod for?" << endl;
    cout << "   1 - 0.14.xx" << endl;
    cout << "   2 - 0.13.xx" << endl;
    cout << "   3 - 0.12.xx or earlier" << endl;
    cout << "Your selection: ";
    int select; cin >> select;
    switch(select){
        case '1': {
            *factorio_version = "0.14";
            cout << "\n\n";
            loop = false;
            } break;
        case '2': {
            *factorio_version = "0.13";
            cout << "\n\n";
            loop = false;
            } break;
        case '3': {
            *factorio_version = "NULL";
            cout << "\n\n";
            loop = false;
            } break;
        default: {
            cout << "\n\nInvalid response.\n\n";
            } break;}}}

我的代码是否有问题？



我尝试过：



我尝试过使用：

Is there some issue with my code?

What I have tried:

I have tried using:

string selectSTR; cin >> stringSTR;
int selectINT = atoi(selectSTR);

以及：

As well as:

string selectSTR; cin >> stringSTR;
char selectCHAR = selectSTR.c_str();

推荐答案

您已声明选择为 int ，但您的案例语句使用字符常量。它们应该是这样的：

You have declared select as int, but your case statements are using character constants. they should be like:

switch(select){
    case 1:
        *factorio_version = "0.14";

此外，您不需要块分隔符（ {和} ）围绕您的案例代码。

Also you do not need block separators ({ and }) surrounding your case code.

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