C++ try/catch语句

在C++编程中，使用try/catch语句执行异常处理。 C++ try块用于放置可能发生异常的代码。catch块用于处理异常。

没有try/catch的示例

#include <iostream>  
using namespace std;  
float division(int x, int y) {  
   return (x/y);  
}  
int main () {  
   int i = 50;  
   int j = 0;  
   float k = 0;  
      k = division(i, j);  
      cout << k << endl;  
   return 0;  
}

执行上面代码得到以下结果 -

Floating point exception (core dumped)

C++ try/catch示例

#include <iostream>  
using namespace std;  
float division(int x, int y) {  
   if( y == 0 ) {  
      throw "Attempted to divide by zero!";  
   }  
   return (x/y);  
}  
int main () {  
   int i = 25;  
   int j = 0;  
   float k = 0;  
   try {  
      k = division(i, j);  
      cout << k << endl;  
   }catch (const char* e) {  
      cerr << e << endl;  
   }  
   return 0;  
}

执行上面代码，得到以下结果 -

Attempted to divide by zero!