c/c++ helloworld

开始：

c：

#include    <errno.h>
#include    <math.h>
#include    <stdio.h>
#include    <stdlib.h>
#include    <string.h>


    int                                                                      
main ( int argc, char *argv[] )                                              
{                                                                            
    printf ("\nProgram %s\n\n", argv[0] );                                   
                                                                             
    return EXIT_SUCCESS;                                                     
}       /* ----------  end of function main  ---------- */

c++：

#include        <cstdlib>                                                    
#include    <cstdlib>
#include    <fstream>
#include    <iomanip>
#include    <iostream>

using namespace std;


    int                                                                      
main ( int argc, char *argv[] )                                              
{                                                                            
    cout    << "\nProgram " << argv[0] << endl << endl;                      
                                                                             
    return EXIT_SUCCESS;                                                     
}       // ----------  end of function main  ---------- 

visual studio 

#include <iostream>
using namespace std;

int main()
{
  cout<<"hello world!"<endl;
  return 0;
}

完