37 lines
758 B
C++
37 lines
758 B
C++
// exception 的使用
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// invalid_argument: 用于处理无效参数异常
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#include <iostream>
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#include <cstdlib>
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#include <exception>
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#include <cstdio>
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using namespace std;
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int maxVal(int a, int b)
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{
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if (a == b)
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{
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char msg[100];
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sprintf(msg, "两个参数不能相等，a = %d, b = %d", a, b);
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throw invalid_argument(msg);
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}
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return a > b ? a : b;
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}
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int main(int argc, char const *argv[])
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{
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int a = atoi(argv[1]);
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int b = atoi(argv[2]);
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try
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{
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int ret = maxVal(a, b);
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cout << "maxValue is " << ret << endl;
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}
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catch (exception &error)
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{
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cout << "error: " << error.what() << endl; // what() 返回异常信息，异常信息是一个字符串
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}
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return 0;
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} |