#include <stdio.h>#include <stdlib.h>#include "./numstr.h"int (*parse[]) (char*) = {parseBin, parseOct, parseDec, parseHex};char* (*format[]) (int) = {formatBin, formatOct, formatDec, formatHex};int main(int argc, char* argv[]){	int i, j;		if(argc!=4)	{			printf("Usage: conv_type input_format output_format number\n");		printf("Example:\tTo convert 1111 from binary to hexadecimal\n"			"\tuse:\tconv_type 0 3 1111\n"			"sequence: bin, oct, dec, hex = 0, 1, 2, 3 respectively\n");			return 1;	}		i = parseDec(argv[1]);	j = parseDec(argv[2]);		if(i<0||i>3||j<0||j>3)	{		printf("Invalid type\n");				return 1;	}	printf("%s\n", (format[j])((parse[i])(argv[3])));	return 0;}