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if argv == string

Homeless Hornet answered on July 10, 2020 Popularity 3/10 Helpfulness 2/10

answer if argv == string

if argv == string

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int main(int argc, char * argv[]) {

  if (argv[1] == "yes"); // Wrong, compares two pointers
  if (strcmp(argv[1], "yes") == 0); // This compares what the pointers point to
  if (std::string(argv[1]) == "yes"); // Works fine
  if (argv[1] == std::string("yes")); // Works fine

  // Easy-mode    
  std::vector<std::string> args(argv, argv+argc);
  for (size_t i = 1; i < args.size(); ++i) {
      if (args[i] == "yes") {
          // do something
      }
  }

}

Popularity 3/10 Helpfulness 2/10 Language cpp

Source: stackoverflow.com

Tags: argv c++ string

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