// header files
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

// local constants

/*
Name: Jump the Five
Process: Takes in 7 or 10 numbers, and applies a transformation to the numbers.
Function input/parameters: argc and argv command line parameters
Function output/parameters: NONE
Function output/returned: NONE
Device input/---: NONE
Device output/---: NONE
Dependencies: included by standard libraries
*/
int main(int argc, char *argv[])
{
    // define local variables
    // do calculations
    // check to see if there are valid phone numbers (7 or 10 digits)
    if(argc == 8 || argc == 11)
    {
        // iterate through the arguments in list
        for(int i = 1; i < argc; i++)
        {
            // define and get the number using atoi
            int num = atoi(argv[i]);
            // check to see if the number is 5/0, and print the opposite.
            if(num == 5)
            {
                printf("0 ");
            }
            else if(num == 0)
            {
                printf("5 ");
            }
            else
            {
                // otherwise, subtract the number from ten to get "the opposite"
                printf("%i ", 10 - num);
            }
        }
        printf("\n");
        return 0;
    }
    printf("You must enter 7 or 10 digits as a valid phone number.\n");
    // return success
    return 0;
}