Question

我收到一条错误，说主要是没有定义猜测。这是怎么回事？编程旨在成为一个猜谜游戏

while只是因为main中定义的猜测而停止，但这会使计算机询问未经测试的输入。

#include <cstdlib>
#include <iostream>
#include <ctime>
using namespace std;

int nextGuess();

int main() 
{
    srand(time(0));
    int number = rand() % 100 + 1;

    cout <<" --GUESSING GAME-- \n You are to enter numbers, trying to guess rthe computer's number"<< endl;

int guess = nextGuess();
    do
    {    
    int guess = nextGuess();

    if (guess > number)
       cout <<"Your guess is to high."<< endl;

    if (guess < number)
       cout <<"Your guess is too low."<< endl;

    if (guess == number)
       cout <<"Good job, that's the number!"<< endl;
    }
    while (guess != number);

    system("pause");

}

int nextGuess()
{
    int guess = 0;
    cout <<"Please enter a number:";
    cin >> guess;

    return guess;
}

**我会粘贴c提示，但不会复制。

Answer 1

你可以拨打nextGuess两次：一旦在循环之前，一旦在循环中。删除第一个调用，即循环之前的调用，但将变量guess的声明保留在循环之外，并且不再在内部声明它。

Answer 2

在你的while循环中，你正在重新定义变量guess。也许把它改成这样的东西：

int guess;
do
{    
    guess = nextGuess();

现在编写它的方式，循环中使用的变量猜测与while条件中使用的变量不同。

Answer 3

您正在调用nextGuess两次并在guess块内重新声明变量do-while。改为：

int guess;
do
{    
guess = nextGuess();

if (guess > number)
   cout <<"Your guess is to high."<< endl;

if (guess < number)
   cout <<"Your guess is too low."<< endl;

if (guess == number)
   cout <<"Good job, that's the number!"<< endl;
}
while (guess != number);

Answer 4

使用while{}代替do{}while

int guess = nextGuess();
while (guess != number)
{    
guess = nextGuess();

if (guess > number)
   cout <<"Your guess is to high."<< endl;

if (guess < number)
   cout <<"Your guess is too low."<< endl;

if (guess == number)
   cout <<"Good job, that's the number!"<< endl;
}

Answer 5

这是因为你两次致电nextGuess。只需在循环外声明变量，然后调用其中的函数即可。

#include <cstdlib>
#include <iostream>
#include <ctime>
using namespace std;

int nextGuess();

int main()
{
    srand(time(0));
    int number = rand() % 100 + 1;

    cout <<" --GUESSING GAME-- \n You are to enter numbers, trying to guess rthe computer's number"<< endl;

    int guess;

    do{
    guess = nextGuess();

    if (guess > number)
       cout <<"Your guess is to high."<< endl;

    if (guess < number)
       cout <<"Your guess is too low."<< endl;

    if (guess == number)
       cout <<"Good job, that's the number!"<< endl;
    }
    while (guess != number);

    return 0;
}
    int nextGuess()
{
    int guess = 0;
    cout <<"Please enter a number:";
    cin >> guess;

    return guess;
}

猜测游戏提示问了太多次

5 个答案: