1   /*------------------------------------------------------------------------
    2   | 
    3   |       File: exec02.c
    4   | 
    5   |       Description: Calls execlp to execute printArgs
    6   |       with "command line arguments".
    7   |       
    8   |       Created:  8 Jan 15
    9   |       Author: glancast
   10   | 
   11   +-----------------------------------------------------------------------*/
   12   
   13   
   14   #include <stdio.h>
   15   #include <stdlib.h>
   16   #include <unistd.h>
   17   
   18   int main(int argc, char *argv[])
   19   {
   20     execlp("printArgs", "A", "B", "C", (char *) 0);
   21     printf("execlp failed!\n");
   22     return 0;
   23   }

Output:
argv[0] = 'A'
argv[1] = 'B'
argv[2] = 'C'