38 lines
836 B
Markdown
38 lines
836 B
Markdown
## exception
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+ 基本结构`try-catch`
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try{
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expression
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}catch(errorType err){
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expression
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}catch(errorType err){
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expression
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}...
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+ 文件支持
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#include <stdexcept>
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//#include <exception>
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using std::runtime_error
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+ 具体使用方法
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- try block内放可能会产生异常的语句，并抛出(throw)相应的异常
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try{
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if(...) throw runtime_error("fatal error: dividing zero");
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if(...) throw ...
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//else
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normal expression
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}
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- 在catch中检查可能会出现的异常，若异常与catch的异常类型对应，则进入相应的异常处理程序
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try{
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...
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}catch(runtime_error err){
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cout << err.what() << endl;//err.what()返回抛出异常时初始化的字符串
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//other handling
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cout << "continue or not(y/n): ";
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char c;
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cin >> c;
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if(c == 'n' || c == 'N') break;
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//else continue
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} |