数据转换-16进制字符

0. 在openEuler(推荐)或Ubuntu或Windows(不推荐)中完成下面任务

1. 在附件中的utils.h和utils.c中完成16进制字符'0'-'9','A'-'F','a'-'f'与十六进制数据0-15的转换功能（10’）：

int Hex2Char(unsigned int fromi,unsigned char * toc);
int Char2Hex(unsigned char fromc,unsigned int * toi);

2. 并写出测试代码测试上述函数(不能与下面代码一样)，比如：（10’）

unsigned char  c;
Hex2Char(1, &c)
//结果：c = '1'
Hex2Char(15, &c)
//结果：c = 'F'
unsigned int i;
Char2Hex('1', &i);
//结果：i = 1
Char2Hex('F', &i);
//结果：i = 15

3. 提交代码（或代码链接）和运行结果

uitls.h

#ifndef _UTIL_H_
#define _UTIL_H_
 
//char Hex2Char(int i);
//int Char2Hex(char c);
 
int Hex2Char(int fromi,char * toc);
int Char2Hex(char fromc,int * toi);
 
int Bitstr2ByteArr(char * bs,char * ba);
int ByteArr2Bitstr(char * ba,char * bs);
 
int Int2ByteArr(int i,char * ba);
int ByteArr2Int(char * ba,int * i);
 
#endif

utils.c

#include<stdio.h>
#include"utils.h"
char Hstr[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
int Hex2Char(int fromi,char *toc)
{
    if(fromi>=0&&fromi<=9)
    {*toc= fromi+'0';}
    else if(fromi>=10&&fromi<=15)
    {*toc = fromi+'A'-10;}
    else
    {printf("error");}
    return 0;}
int Char2Hex(char fromc,int *toi)
{
        if(fromc>='0'&& fromc<='9')
        {*toi= fromc-'0';
        }
        else if(fromc>='A'&& fromc<='F')
        {*toi= fromc-'A'+10;}
        else
        {printf("error");}
        return 0;
}

main.c

#include<stdio.h>
#include"utils.h"
int main(){
  int n1,n2;
  char c1,c2;
  printf("请输入一个0~15的数：");
  scanf("%d",&n1);
  Hex2Char(n1,&c1);
  printf("对应的16进制字符是%c\n",c1);
  printf("请输入一个16进制字符：");
  scanf("%s",&c2);
  Char2Hex(c2,&n2);
  printf("%c对应的数是%d\n",c2,n2);
}

运行截图：