How to use go out in c language

C language go out usage: 1. Use the return statement. When using the return statement, you can indicate the exit status of the program by returning an integer value; 2. Use the exit() function to accept an integer value parameter. , used to indicate the program exit status; 3. Use the abort() function to terminate the execution of the program, which will generate an exception signal, causing the program to generate a core file for subsequent debugging and analysis; 4. Use signal() Functions that can perform customized operations when receiving specific signals.

The operating environment of this article: Windows 10 system, Code Blocks version 20.03, Dell G3 computer.

"go out" in C language usually refers to the exit or termination of the program. In C language, there are several common ways to implement program exit. These methods are described in detail below.

Use the return statement:

In C language, the return statement is used to return a value from a function and can be used to exit the program. When using the return statement in the main function, you can represent the program's exit status by returning an integer value. Generally, a return value of 0 indicates that the program exited normally, and a non-zero value indicates that an error or exception occurred in the program. For example:

#include <stdio.h>
int main() {
   // 执行程序的代码
   
   return 0; // 正常退出
}

Use the exit() function:

The exit() function in the C standard library can be used to immediately terminate the execution of the program. This function accepts an integer value parameter that represents the exit status of the program. Like the return statement, a return value of 0 indicates that the program exited normally, and a non-zero value indicates that an error or exception occurred in the program. For example:

#include <stdio.h>
#include <stdlib.h>
int main() {
   // 执行程序的代码
   
   exit(0); // 正常退出
}

Use the abort() function:

The abort() function can also be used to terminate the execution of the program, but it will generate an exception signal, causing the program to Generate a core file for subsequent debugging and analysis. This function does not accept any parameters. For example:

#include <stdio.h>
#include <stdlib.h>
int main() {
   // 执行程序的代码
   
   abort(); // 异常退出
}

Use the signal() function:

The signal() function is used to set a signal processing function, which can execute customized actions when a specific signal is received. operate. Can be used to terminate program execution when the SIGINT signal (usually generated by the user typing Ctrl C) is received. For example:

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
void sigintHandler(int sig) {
   printf("Received SIGINT signal. Terminating...\n");
   exit(0);
}
int main() {
   signal(SIGINT, sigintHandler); // 设置信号处理函数
   
   // 执行程序的代码
   
   while (1) {
      // 程序循环执行
   }
   
   return 0;
}

The above are several common ways to implement program exit in C language. Depending on the actual needs and circumstances, you can choose a suitable method to end the execution of the program.

The above is the detailed content of How to use go out in c language. For more information, please follow other related articles on the PHP Chinese website!