C++ If/Else语句问题

Question

我对这些 If/Else 语句的语法做错了什么 我很确定它与我的花括号位置有关。 我书中的所有示例仅包含真正原始/简单的示例(并不是说这段代码不简单；b/c 确实如此)。我想我的一般问题也是如何将这两个单独的语句分开。当我执行时，这两个独立的功能似乎混合在一起。

  //
    tens = rand / 10;
    if (tens =  2){
            cout << "twenty ";
    else if (tens = 3)
            cout << "thirty ";
    else if (tens = 4)
            cout << "forty ";
    else if (tens = 5)
            cout << "fifty ";
    else if (tens = 6)
            cout << "sixty ";
    else if (tens = 7)
            cout << "seventy ";
    else if (tens = 8)
            cout << "eighty ";
    else if (tens = 9)
            cout << "ninety ";
    }

    //
    ones = rand % 10;
    if (ones =  0){
            cout << "\n";
    else if (ones = 1)
            cout << "one\n";
    else if (ones = 2)
            cout << "two\n";
    else if (ones = 3)
            cout << "three\n";
    else if (ones = 4)
            cout << "four\n";
    else if (ones = 5)
            cout << "five\n";
    else if (ones = 6)
            cout << "six\n";
    else if (ones = 7)
            cout << "seven\n";
    else if (ones = 8)
            cout << "eight\n";
    else if (ones = 9)
            cout << "nine\n";
    }

Answer 1

我认为，对于这个特殊问题，if-else 甚至不是必需的!

我宁愿推荐这个解决方案:

const char *stens[] = {"", "", "twenty", "thirty", "forty", "fifty",
                               "sixty", "seventy", "eighty", "ninty"};
const char *sones[] = {"", "one", "two", "three", "four", "five", 
                               "six", "seven", "eigth", "nine"};

//make sure  0<= rand <= 99
 cout << stens[ rand / 10 ] << " " << sones[ rand % 10 ] << endl;

在线演示:http://www.ideone.com/K7HxS

至于你在 if-else 中遇到的问题，你使用的是赋值运算符，而不是相等，因为每个人已经指出了。