Question

我目前正在开发一个C ++类的项目，分配如下。 创建一个程序，读取总统文件，并要求用户猜测所选总统的正确值。 我们得到了一个包含所有数据的.txt文件，并且在文件中就是这样。

1
George Washington
(1732 to 1799)
April 30, 1789
March 4, 1797
Independent
Commander-in-Chief; of the Continental Army (1775 to 1783)
John Adams                          
2
John Adams
(1735 to 1826)
March 4, 1797
March 4, 1801
Federalist
Vice President
Thomas Jefferson

最高号码是总统号码，第二个是他们的姓名，第三个是他们的出生日期和死亡日期，第四个是他们上任的那天，第五个是他们离开办公室，第六个是派对，第七个是以前的办公室，以及7日是他们的副总统。这是读取文件的方法的代码。

void presidentGame::readPresidents(){

        string fileName = "presidents.txt";
        string strNum, name, birthDeath, tookOffice, leaveOffice, party, previousOffice, vicePresident;
        int num;
        ifstream inFile(fileName);
        if (! inFile) {
            cout << "Failed to find the file " << fileName  << endl;
        }
        else {
            while (getline(inFile, strNum)){
                num = stoi(strNum);  //I did this because an actual int is better than a string
                getline(inFile, name);
                getline(inFile, birthDeath);
                getline(inFile, tookOffice);
                getline(inFile, leaveOffice);
                getline(inFile, party);
                getline(inFile, previousOffice);
                getline(inFile, vicePresident);
                president tempPresident(num, name, birthDeath,tookOffice, leaveOffice, party, previousOffice, vicePresident);
                presidents.push_back(tempPresident);
            }
        }
}

正在发生的问题是num在命令提示符下显示为Alt代码值。以下是正确回答时的输出示例。

***********************************************
Correct Incorrect       Total Guesses
======= =========       =============
0          11                 11
Guess which President Thomas Jefferson was? <♥> 3

Congrats, You finally got one right!

Thomas Jefferson was the ♥rd President

President Information:
============================
He lived from (1743 to 1826)
He took office March 4, 1801
He left office on March 4, 1809
His party was Democratic-Republican
His previous office held was Vice PresidentHis vice president was 1st term: Aaro
n Burr / 2nd term: George Clinton
Press any key to continue...

因此，不是将数字显示为“3”，而是将其显示在alt + NUM_3，即♥。任何帮助表示赞赏。

Answer 1

如果没有看到输出代码，可能会出现多种原因。但最有可能的是，你有这样的事情发生了：

string outputBuffer = presidentName;
outputBuffer += " was the ";
outputBuffer += presidentNumber; // The problem is here.
outputBuffer += getSuffix(presidentNumber); // Or whatever logic you have for this
outputBuffer += " President";

修复很简单：

outputBuffer = to_string(presidentNumber); // Replace the problem line with this

C ++在类型检测方面相当不错，但它仍然是一种强类型语言。编译器将presidentNumber解释为文字字符并且没有错误（尽管取决于您的编译器和标志，您可能会收到警告）。

因此，如果presidentNumber = 65，则表示“A”字符。（别担心没有第65任总统，只是一个例子）。

<强>实施例

之前：http://cpp.sh/2tjj

之后：http://cpp.sh/8izy

返回Alt代码而不是int C ++

1 个答案: