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C++ try/catch

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

没有try/catch的C++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;
}

输出:

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;
}