Sum the two numeric command line arguments : command line arguments « Development « C++ Tutorial

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C++ Tutorial » Development » command line arguments

5.11.3.Sum the two numeric command line arguments

#include <iostream> 

#include <cstdlib> 

using namespace std; 

 

int main(int argc, char *argv[]) 

{ 

  double a, b; 

 

  if(argc!=3) { 

    cout << "Usage: main num num\n"; 

    return 1; 

  } 

 

  a = atof(argv[1]); // convert first command-line arg 

  b = atof(argv[2]); // convert second comnand-line arg 

 

  cout << a + b; 

 

  return 0; 

}

Usage: main num num

5.11.command line arguments
	5.11.1.	Display command-line arguments
	5.11.2.	Using command-line arguments for copying files
	5.11.3.	Sum the two numeric command line arguments

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