while (true) { Console.WriteLine("请输入一个整数:"); string input = Console.ReadLine(); int number; if (int.TryParse(input, out number)) { // 用户输入有效的整数,执行相应的操作 Console.WriteLine("您输入的整数是:" + number); break; // 结束循环 } else { // 用户输入无效,显示...
In C++, there are three main types of loops, as mentioned below: While Loop: The while loop repeatedly executes a block of code as long as a specified condition is true. Do-While Loop: The do-while loop is similar to the while loop but with one crucial difference: the condition is ...
下述程序演示了怎样使用clock()和头文件ctime来创建延迟循环。 //waiting.cpp -- using clock() in a time-delay loop #include #include //describes clock() function,clock_t type int main() { using namespace std; cout< seconds: "; float secs; cin>>secs; clock_t delay=secs*CLOCKS_PER_SEC;...
The while keyword executes the statements inside the block enclosed by the curly brackets. The statements are executed each time the expression is evaluated to true. C++ while exampleThe following example uses a while statement to calculate a sum. simple.cpp ...
waiting.cpp #include <iostream> #include <ctime> using namespace std; int main() { cout<<"enter the delay time in seconds : "; float secs; cin>>secs; clock_t delay=secs*CLOCKS_PER_SEC; cout<<"starting \a\n"; clock_t start=clock(); while (clock()-start<delay){ ; } cout<<...
业内普遍定义的石器时代大概是在十几、二十年前，刚刚进入数据库发展的快速轨道，当时的技术方案和对于 ...
当你习惯性使用 while true 的时候,Rust 会以警告的方式提示你:无限循环请使用 loop。但是你执意要使用 while true 的话,就最好加上 `#[allow(while_true)]` 。然而,我其实更喜欢用 loop,简单明了。 这其实也算是 Rust 语言设计上的一种妥协吧。原因有二: while true 在语义上确实会让人理解为无限循环...
0:return Falsereturn Truedef find_largest_prime_genexpr():largest_prime = max(n for n in ...
The while loop loops through a block of code as long as a specified condition is true:Syntax while (condition) { // code block to be executed }In the example below, the code in the loop will run, over and over again, as long as a variable (i) is less than 5:...
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