C語言 十六進制與ascii碼互轉

功能：十六進制與ascii碼互轉

#include<stdlib.h> #include<stdio.h> #include<string.h>unsigned char name[15] = {"1234567890abcde"}; unsigned char name1[15] = {0x31,0x32,0x33,0x34,0x35,0x31,0x32,0x33,0x34,0x35,0x31,0x32,0x33,0x34,0x35}; unsigned char put[15]; unsigned char data[16];//ascii轉16進制 unsigned char char_to_hex(unsigned char char_num) {if ((char_num >= '0') &&(char_num <= '9')){/* code */char_num = 0x30+(char_num - '0');}else if ((char_num >= 'A') &&(char_num <= 'Z')){/* code */char_num = 0x41+(char_num - 'A');}else if ((char_num >= 'a') &&(char_num <= 'z')){/* code */char_num = 0x61+(char_num - 'a');}elsechar_num = 0xff;return char_num; }//16進制轉ascii unsigned char hex_to_char(unsigned char hex_num) {if ((hex_num>=0x30) && (hex_num<=0x39)){/* code */hex_num = '0'+ hex_num - 0x30;}else if ((hex_num>=0x41) && (hex_num<=0x5A)){/* code */hex_num = 'A' + (hex_num - 0x41);}else if ( (hex_num>=0x61) && (hex_num<=0x7A)){/* code */hex_num = 'a' + (hex_num - 0x61);}elsehex_num = 0xff;return hex_num;}void main() {int len;len = strlen(name);for (int i = 0; i < len; i++){/* code */put[i] = char_to_hex(name[i]);}for (int i = 0; i < len; i++){/* code */printf("char_to_hex:0x%02x\n",put[i]);}for (int i = 0; i < len; i++){/* code */data[i] = hex_to_char(put[i]);}//data[15] = '\0';printf("hex_to_char:%s\n",data);system("pause"); }

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