#include <stdio.h>
#include <stdlib.h>

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

    if(argc!=3)
    {
        puts("Type two items after CMDLINE3");
        exit(0);
    }

/* swap the arguments */

    temp = argv[1];
    argv[1] = argv[2];
    argv[2] = temp;

/* display arguments */

    printf("argv[1] = %s\n",argv[1]);
    printf("argv[2] = %s\n",argv[2]);
}