dec2hex.c

/*
**DESCRIPTION:convert deciaml to hex
**Author:liy
**DATE:8-12-2006
*/

#include <stdio.h>
void dec2hex(int );

int main(){
 int num;
 printf("Input a decimal number:");
 scanf("%d",&num);
 dec2hex(num);
 return 0;
}

void dec2hex(int dec){
 int n, i;
 int len = 0;
 char str[20];
 int temp_dec = dec;
// bzero(str, 20);
 while(temp_dec != 0){
  temp_dec /= 16;
  len++;
 }
 i = len - 1;
 printf("i[%d]/n",i);
 while(dec != 0){
  n = dec % 16;
  dec /= 16;
  printf("n[%d],dec[%d]/n",n,dec);
  if(n < 10){
   str[i--] = n + '0';
  }
  else{
   str[i--] = (n - 10) + 'a';
  }
 }
 printf("i[%d],len[%d]/n",i,len);
 str[len] = '/0';
 printf("The number HEX is :0x");
 puts(str);
}