Put command line input into an array and parse this array into two new arrays

Question

I was told to remake this with proper comments and the actually code I'm working on. I'm attempting to take a command line input and put it into an array. I want to then parse this array into two new arrays.

The problems are argv[1] is a char * so I'm running into problems converting into an INT. I also can't figure out how to take each element from argv[1], (e.g. 1010101) and place those 1's and 0's into an array. Once I figure this out, I'm going to take this array and parse it if the input is greater than 5. The command line argument coming in is going to be either 5 length or 10 length. If its 5 I do nothing, if its 10 I parse the input into two arrays.

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


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


int i;
//starting using char * arrays in order to try to grab input from the char * argv[1] command line arg
char *aA[10] = {0};
char *aB[10] = {0};
char *aC[10] = {0}; 
char *s = '1';
char *k = '0';

//read in from command the command line.  Print the arguments and save
//the 1 and 0 inputs into an array.
//need to check for EOF and next lines
for (i = 0; i < argc; i++)
{
    if (argv[i] == (s | k)) //attempting to find a way to look at 1 and 0 as a char
    {
        aA[i] = argv[i]; //place the 1 or 0 into array aA
    }

    printf("arg %d: %s\n", i,  argv[i]);
}

printf("\n");

//print array aA to see if it caught all of the 1's and 0's from the command line argument
for (i = 0; i < 8; i++)
{
    printf("%s ", aA[i]);
}

//next check if array aA is 5 strlen or 10 strlen
//if 5, do nothing
//if 10, parse array aA into two arrays aB and aC
//aB gets a[0] a[2] a[4] a[6] a[8]
//aC gets a[1] a[3] a[5] a[7] a[9] 
//print the results of aB and aC to make sure aA was correctly parsed   


printf("\n");
return 0;

}

Please provide an example of what you mean: what command line arguments are you expecting, and what do you want to do with them? — Scott Hunter
– Scott Hunter, Commented Dec 2, 2014 at 19:05
10101 a 1000110001 Above is a sample input from the command line. I need to take the 10101 and put that into an array, check the next line and notice that its an a which tells me to preform an addition. Next I check the last line which is a combination of two numbers, which will need to be parsed into two arrays before I can perform any actions on them — Yawn
– Yawn, Commented Dec 2, 2014 at 19:11
should I attempt to use atoi? like make an int b = atoi argv[1] and then I would have a int # like 10001, maybe theres a way to break this into single numbers by parsing with maybe a mask like aA[0] = b | 0x10000 to grab the first 1? — Yawn
– Yawn, Commented Dec 2, 2014 at 19:20
What logic do you use to conclude that 1000110001 is a combination of two numbers? — R Sahu
– R Sahu, Commented Dec 2, 2014 at 19:38
each number is 5 digits long, so a ten digit length string will be two numbers — Yawn
– Yawn, Commented Dec 2, 2014 at 21:07

user3629249 · Accepted Answer · 2014-12-02 20:34:47Z

given a command line: myexecutable 10101   or myexecutable 1010101010

char originalArray[10] = {'\0'};
int array1[5] = {0};
int array2[5] = {0};
int i; // loop counter

if (2 == argc)
{ // then parameter exists
    if( (10 == strlen(argv[1])) || (5 == strlen(argv[1]) )
    { // then valid parameter length
        strncpy( originalArray, argv[1], strlen(argv[1]) );
    }

    else
    { // not valid parameter length
        // handle error
        exit( EXIT_FAILURE );
    }


    for( i=0; i<5; i++ )
    {
        if( ('1' == originalArray[i]) || ('0' == originalArray[i]) )
        { // then valid char 
            array1[i] = originalArray[i] - '0';
        }

        else
        { // invalid char in parameter
            // handle error
             exit( EXIT_FAILURE );
        } // end if
    } // end for


    if( 10 == strlen(originalArray) )
    { // then set second array
        for( i=5; i<10;i++ )
        {
            if( ('1' == originalArray[i]) || ('0' == originalArray[i]) )
            { // then valid character
                array2[i-5] = originalArray[i] - '0';
            }

            else
            { // invalid char in parameter
                // handle error
                exit( EXIT_FAILURE );
            } // end if
        } // end for
    } // end if

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