Time Calculator/src/main.c (Time Calculator)

//This is the main script which will handle user input and call the associated "It" function
//The "It" function is described in the timec.h header file
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "timec.h"
#include "timef.h"

//For the detail and usage of the functions go to the associated header f

//An enumerator for the options
enum options{
    calculate = 'c',
    add = 'a',
    sub = 's',
    help = 'h',
    file = 'f'
};

int main(int argc,char **argv)
{
    if(argc < 2){
        printf(USAGE);
        return 1;
    }

    if(argv[1][0] != '-'){
        printf("Usage : \n");
        printf(USAGE);
        return 1;
    } else {
        //code var is used to store the int returned by a "It" function
        //and is used as the return code for the program
        int code;
        switch(argv[1][1]){
            case calculate:
                code = calculateIt(argc,argv);
                return code;
            case add:
                code = addIt(argc,argv);
                return code;
            case sub:
                code = subIt(argc,argv);
                return code;
            case help:
                helpIt();
                return 1;
            case file:
                code = fileIt(argc,argv);
                return code;
            default:
                printf(INVALID_OPTION);
                return 1;
        }
    }
}