这是我的第一个简单程序。它不停地打印Guess what it is.
,甚至不询问用户输入。 (下一行代码。)
我的错是什么?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string userName;
cout << "Hello there.\n";
cout << "My name is TARS. \n";
cout << "What is your name? \n";
getline(std::cin, userName);
cout << userName << ", let's play a game.\n";
int secretNum;
secretNum = rand() % 20 + 1;
cout << "I'm thinking of a number between 1-20.\n";
int Guess;
bool conti = true;
while (conti)
cout << "Guess what it is. \n";
cin >> Guess;
if (Guess == secretNum)
{
cout << "You read my mind!";
conti = false;
}
if (Guess < secretNum)
{
cout << "That is too low.";
}
if (Guess > secretNum)
{
cout << "That is too high.";
}
return 0;
}
答案 0 :(得分:2)
你需要为while循环使用大括号,否则它将永远执行该单个语句。
答案 1 :(得分:2)
您需要使用brackets
#include <iostream>
#include <string>
using namespace std;
int main()
{
string userName;
cout << "Hello there.\n";
cout << "My name is TARS. \n";
cout << "What is your name? \n";
getline(std::cin, userName);
cout << userName << ", let's play a game.\n";
int secretNum;
secretNum = rand() % 20 + 1;
cout << "I'm thinking of a number between 1-20.\n";
int Guess;
bool conti = true;
while (conti)
{
cout << "Guess what it is. \n";
cin >> Guess;
if (Guess == secretNum)
{
cout << "You read my mind!";
conti = false;
}
if (Guess < secretNum)
{
cout << "That is too low.";
}
if (Guess > secretNum)
{
cout << "That is too high.";
}
}
return 0;
}
默认情况下,如果您不使用它们,则下一行将被视为while循环的一部分 在你的情况下:
while (conti)
cout << "Guess what it is. \n";
答案 2 :(得分:1)
while (conti)
cout << "Guess what it is. \n";
相当于:
while (conti)
{
cout << "Guess what it is. \n";
}
即。循环在那里结束。您需要的是在正确的位置为环提供开合括号。
while (conti)
{
cout << "Guess what it is. \n";
cin >> Guess;
if (Guess == secretNum)
{
cout << "You read my mind!";
conti = false;
}
if (Guess < secretNum)
{
cout << "That is too low.";
}
if (Guess > secretNum)
{
cout << "That is too high.";
}
}
答案 3 :(得分:1)
你有missed the braces
for while循环。你可以试试这个:
#include <iostream>
#include <string>
using namespace std;
int main()
{
string userName;
cout << "Hello there.\n";
cout << "My name is TARS. \n";
cout << "What is your name? \n";
getline(std::cin, userName);
cout << userName << ", let's play a game.\n";
int secretNum;
secretNum = rand() % 20 + 1;
cout << "I'm thinking of a number between 1-20.\n";
int Guess;
bool conti = true;
while (conti){
cout << "Guess what it is. \n";
cin >> Guess;
if (Guess == secretNum)
{
cout << "You read my mind!";
conti = false;
}
if (Guess < secretNum)
{
cout << "That is too low.";
}
if (Guess > secretNum)
{
cout << "That is too high.";
}
}
return 0;
}
答案 4 :(得分:1)
您缺少两个curly braces
以扩大while循环的范围。请注意,如果没有花括号,C ++中任何循环的范围将在第一个分号处停止。这是一个有效的解决方案:
#include <iostream>
#include <string>
using namespace std;
int main()
{
string userName;
cout << "Hello there.\n";
cout << "My name is TARS. \n";
cout << "What is your name? \n";
getline(std::cin, userName);
cout << userName << ", let's play a game.\n";
int secretNum;
secretNum = rand() % 20 + 1;
cout << "I'm thinking of a number between 1-20.\n";
int Guess;
bool conti = true;
while (conti)
{ // <-- This curly brace was missing
cout << "Guess what it is. \n";
cin >> Guess;
if (Guess == secretNum)
{
cout << "You read my mind!";
conti = false;
}
if (Guess < secretNum)
{
cout << "That is too low.";
}
if (Guess > secretNum)
{
cout << "That is too high.";
}
} // <-- This curly brace was also missing
return 0;
}