conv_type.c

数据进制转换源码

#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;
}