我试图让一个程序让用户输入一个单词或字符,存储它,然后打印它,直到用户再次键入它,退出程序.我的代码看起来像这样:
#include <stdio.h>
int main()
{
char input[40];
char check[40];
int i=0;
printf("Hello!\nPlease enter a word or character:\n");
gets(input);
printf("I will now repeat this until you type it back to me.\n");
while (check != input)
{
printf("%s\n", input);
gets(check);
}
printf("Good bye!");
return 0;
}
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问题是我不断打印输入字符串,即使用户输入(检查)与原始(输入)匹配.我比较错误吗?
我正在使用 Microsoft Visual C++ 将以下程序编译为 C++20 程序:
#include <iostream>
#include <tuple>
int main()
{
auto t1 = std::make_tuple("one", "two", "three");
auto t2 = std::make_tuple("one", "two", "three");
std::cout << "(t1 == t2) is " << std::boolalpha << (t1 == t2) << "\n";
std::cout << "(t1 != t2) is " << std::boolalpha << (t1 != t2) << "\n";
return 0;
}
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当我运行它时,我看到以下输出:
(t1 == t2) is false
(t1 != t2) is true
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元组是相同的,那么为什么它的比较结果是错误的呢?我该如何解决?