Preface (must read)

system

To use the system function in Dev-C++, it is necessary to include the header file #include <process.h>. This function is used to execute Windows commands or external programs. The following is the specific usage:

Function Definition

The system function is used to execute the passed string as a system command, and its prototype is:

int system(const char *command);  

For example, system ("dir") can execute the dir command from the Windows command prompt.

Common application examples

• Clear screen: System (CLS) clears console output.

• Freeze screen: System ("pause") pauses program execution for easier observation of output results.

• Change console color: system ("color 0A") (where 0 is the background color code and A is the text color code).

• Execute external programs such as system ("notepad. exe") to open Notepad.

Advanced features

1.System Management:

• Shutdown/restart: system ("shutdown - s - t 0") (Windows shuts down immediately) or system ("power-off") (Linux shuts down).

• Terminate process: system ("taskkill/F/IM notepad. exe") (Windows) or system ("kill -9 1234") (Linux).

2.File operation:

• Create directory: system ("mkdir folder") (cross platform conditional compilation processing path differences).

• File operation: system ("copy file1. txt file2. txt") (Windows) or system ("cp file1. txt file2. txt") (Linux).

Sleep

In C++, sleep related functions are mainly used for delaying operations of threads or processes.

Basic usage: It needs to include the<windows. h>header file, the function name is Sleep (capitalized), and the parameter unit is milliseconds. For example, Sleep (1000) represents a 1-second pause.

Example:

#include <windows.h>
int main() {
    Sleep(500); //Pause for 500 milliseconds
    return 0;
}