Thread: Reorder argv

I have the following task:
Write a program that reorders the command-line argument array argv[], placing all strings that start with '-' first, followed by all other strings.

Code:

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


int main(int argc, char* argv[])
{
    char* aux;
    printf("Program name is %s\n", argv[0]);
    if(argc == 1)
        printf("Program called with no arguments.");
    else
    {
        for(int i = 1; i < argc; i++)
        {
            if(argv[i][0] == '-')
            {
                aux = argv[i];
                argv[1] = aux;
                artv[i] = aux;
            }
            printf("Argument %d is: %s", i, argv[i]);


        }


    }
    return 0;
}

For the command:
./a.out string1 -string2 string3 string4
Program name is ./a.out
Argument 1 is: string1
Argument 2 is: string1
Argument 3 is: string3
Argument 4 is: string4


So it basically copied argument 1 into argument 2, but I wanted to swap them. So I should've gotten:
Argument 1 is: -string2
Argument 2 is: string1
Argument 3 is: string3
Argument 4 is: string4


Am I getting the first character of each string correctly with argv[i][0]? I google'd this but I didn't find much.

Thanks!

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, char* argv[])
{
    char* aux;
    printf("Program name is %s\n", argv[0]);
    if(argc == 1)
    printf("Program called with no arguments.");
    else
    {
        for(int i = 1; i < argc; i++)
        {
            for(int j = i+1; j < argc; j++)
            {
                while(argv[i][0] != '-' && argv[j][0] == '-')
                {
                    aux = argv[i];
                    argv[i] = argv[j];
                    argv[j] = aux;
                }
            }
            printf("Argument %d is: %s\n", i, argv[i]);
        }
     }
    return 0;
}

Command: ./a.out string1 -string2 string3 -string4 -string5
Program name is ./a.out
Argument 1 is: -string2
Argument 2 is: -string4
Argument 3 is: -string5
Argument 4 is: string1
Argument 5 is: string3