C++ raise()用法及代码示例

信号头文件声明了函数raise()以处理特定信号。 Signal会在程序中学习一些异常行为，然后调用信号处理程序。它用于检查是否调用默认处理程序或将其忽略。

用法:

int raise ( int signal_ )

参数：该函数接受单个参数sig，该参数指定人为引发的信号。它可以接受任何6 C标准信号。定义的信号类型

SIGILL
SIGINT
SIGSEGV
SIGTERM
SIGABRT
SIGFPE

返回值：它返回一个非零值，信号中没有错误，否则返回零。该函数返回具有不同定义信号的不同非零元素。

以下示例程序旨在说明上述方法：
程序1:

// C++ program to illustrate the 
// raise() function when SIGABRT is passed 
#include <csignal> 
#include <iostream> 
using namespace std; 
  
sig_atomic_t s_value = 0; 
void handle(int signal_) 
{ 
    s_value = signal_; 
} 
  
int main() 
{ 
    signal(SIGABRT, handle); 
    cout << "Before called Signal = " << s_value << endl; 
    raise(SIGABRT); 
    cout << "After called Signal = " << s_value << endl; 
    return 0; 
}

输出：

Before called Signal = 0
After called Signal = 6

程序2:

// C++ program to illustrate the 
// raise() function when SIGINT is passed 
#include <csignal> 
#include <iostream> 
using namespace std; 
  
sig_atomic_t s_value = 0; 
void handle(int signal_) 
{ 
    s_value = signal_; 
} 
  
int main() 
{ 
    signal(SIGINT, handle); 
    cout << "Before called Signal = " << s_value << endl; 
    raise(SIGINT); 
    cout << "After called Signal = " << s_value << endl; 
    return 0; 
}

输出：

Before called Signal = 0
After called Signal = 2

程序3:

// C++ program to illustrate the 
// raise() function when SIGTERM is passed 
#include <csignal> 
#include <iostream> 
using namespace std; 
  
sig_atomic_t s_value = 0; 
void handle(int signal_) 
{ 
    s_value = signal_; 
} 
  
int main() 
{ 
    signal(SIGTERM, handle); 
    cout << "Before called Signal = " << s_value << endl; 
    raise(SIGTERM); 
    cout << "After called Signal = " << s_value << endl; 
    return 0; 
}

输出：

Before called Signal = 0
After called Signal = 15

程序4:

// C++ program to illustrate the 
// raise() function when SIGSEGV is passed 
#include <csignal> 
#include <iostream> 
using namespace std; 
  
sig_atomic_t s_value = 0; 
void handle(int signal_) 
{ 
    s_value = signal_; 
} 
  
int main() 
{ 
    signal(SIGSEGV, handle); 
    cout << "Before called Signal = " << s_value << endl; 
    raise(SIGSEGV); 
    cout << "After called Signal = " << s_value << endl; 
    return 0; 
}

输出：

Before called Signal = 0
After called Signal = 11

程序5:

// C++ program to illustrate the 
// raise() function when SIGFPE is passed 
#include <csignal> 
#include <iostream> 
using namespace std; 
  
sig_atomic_t s_value = 0; 
void handle(int signal_) 
{ 
    s_value = signal_; 
} 
  
int main() 
{ 
    signal(SIGFPE, handle); 
    cout << "Before called Signal = " << s_value << endl; 
    raise(SIGFPE); 
    cout << "After called Signal = " << s_value << endl; 
    return 0; 
}

输出：

Before called Signal = 0
After called Signal = 8

相关用法

注：本文由纯净天空筛选整理自AmanSrivastava1大神的英文原创作品 raise() function in C++。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。