#include <stdio.h>

#include <windows.h>

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

{

	char *outbuff,*transform; 

	char *color[] = {"violet", "indigo", "blue", "green", "yellow","orange","red", NULL };

	if (argc != 2)

	{

		printf(

			"Provide a string argument in double quotes for conversion\n"

			"Raibowstring.exe \"Wish You Success\"\n";

		return FALSE;

	}

	int instrlen = strlen(argv[1]), count=0 , i = 0;

	if ( (( outbuff = (char *)malloc(50*instrlen)) == 0)  || (( transform = (char *)malloc(0x100)) == 0)) 

	{

		printf("malloc failed\n";

		return FALSE;

	}

	memset(outbuff,0,(50*instrlen));

	memset(transform,0,0x100);

	while (count < instrlen)

	{

		for (i = 0; i< 7; i++)

		{

			if(argv[1][count] != NULL)

			{

				sprintf_s(transform,0x50,"%c",color[I],argv[1][count]);

				strncat_s(outbuff,2100,transform,2100);

				count++;

			}

		}

	}

	printf("%s\n",outbuff);

	free(outbuff);

	free(transform);

	return 0;

}