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並前往https://codereview.stackexchange.com/questions/164365/checking-if-command-line-input-is-an-integer

Checking if command line input is an integer - Code Review ...

strtol will work just fine for this job: char *end; int correctInput = strtol(argv[1], &end, 10); if (*end != '\0') { std::cout << "invalid ...

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