数据转换-整数字节数组

代码

main.c

#include<stdio.h>

#include"utils.h"

int main(){

  int p;

  char bytearr[100];

  printf("please input\n");

  scanf("%d",&p);

  printf("change int to char\n");

  INT2ByteArr(p,bytearr);

  printf("char%s\n",bytearr);

  char barr[100];

  int h;

  printf("please input char:");

  scanf("%s",barr);

  printf("change char to int:");

  ByteArr2INT(barr,&h);

  printf("%d\n",h);

}

utils.c

#include<stdio.h>

#include"utils.h"

#include<string.h>

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("incorrect！");

     }

    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("incorrect");

        }

    return 0;

}

int INT2ByteArr(int i,char *ba){

   int j;

   int a;

   int sum=0;

   int k=i;

   for(j=0;;j++)

   {

     k=k/16;

     if(k!=0)

      sum++;

     else

       break;

   }

   for(j=sum;j>=0;j--){

     a = i%16;

     Hex2Char(a,&ba[j]);

     i=i/16;   

   }

   ba[sum+1]='\0';

}

int ByteArr2INT(char *ba,int *i)

{

   int len;

   int j;

   int n=0;

   *i=0;

   len = strlen(ba);

   for(j=0;j<len;j++)

   {

      Char2Hex(ba[j],&n);

      //printf("%d\n",n);

      *i=(*i)*16+n;  

   }

}

运行截图