C语言定义 二进制 十六进制 普通字符串 转换函数
直接上干货，没啥好说的：
代码1：十六进制转字符串函数
1 #include<stdio.h> 2 #include<string.h> 3 #include<ctype.h> 4 void Hex2Byte(const char* source, unsigned char* dest, int sourceLen) 5 { 6 short i; 7 unsigned char highByte, lowByte; 8 for (i = 0; i < sourceLen; i += 2) 9 { 10 highByte = toupper(source[i]); 11 lowByte = toupper(source[i + 1]); 12 if (highByte > 0x39) 13 highByte -= 0x37; //'A'->10 'F'->15 14 else 15 highByte -= 0x30; //'1'->1 '9'->9 16 if (lowByte > 0x39) 17 lowByte -= 0x37; 18 else 19 lowByte -= 0x30; 20 dest[i / 2] = (highByte << 4) | lowByte; 21 } 22 } 23 int main(){ 24 char src[200]="466c6f776572732061726520736f20696e636f6e73697374656e74212042757420492077617320746f6f20796f756e6720746f206b6e6f7720686f7720746f206c6f76652068652e\0"; 25 unsigned char buf[100]={0}; 26 Hex2Byte(src,buf,strlen(src)); 27 printf("%d\n",strlen(buf)); //打印一下生成十六进制字符串的长度 28 puts(buf); 29 return 0; 30 }
执行效果：
代码2：字符串转十六进制字符串函数
1 #include<stdio.h> 2 #include<string.h> 3 //字符串转十六进制字符串 4 void Str2Hex( const char *sSrc, char *sDest, int nSrcLen ) 5 { 6 int i; 7 char szTmp[3]; 8 9 for( i = 0; i < nSrcLen; i++ ) 10 { 11 sprintf( szTmp, "%02X", (unsigned char) sSrc[i] ); 12 memcpy( &sDest[i * 2], szTmp, 2 ); 13 } 14 return ; 15 } 16 int main(int argc, char const *argv[]) 17 { 18 char source[100]="Hello world！\0"; 19 char dest[100]={0}; 20 Str2Hex(source,dest,strlen(source)); 21 puts(dest); 22 return 0; 23 }
执行效果：
代码3：二进制字符串到十六进制字符串函数
1 #include <stdio.h>
2 #include<string.h> 3 void Bin2Hex(const char *sSrc, char *sDest, int nSrcLen){ 4 int times=nSrcLen/4; 5 char temp[times]; 6 int x=0; 7 for(int i=0;i<times;i++){ 8 //int num=8*int(sSrc[i*4])+4*int(sSrc[i*4+1])+2*int(sSrc[i*4+2])+int(sSrc[i*4+3]); 9 x=8*(sSrc[i*4]-'0'); 10 x+=4*(sSrc[i*4+1]-'0'); 11 x+=2*(sSrc[i*4+2]-'0'); 12 x+=sSrc[i*4+3]-'0'; 13 sprintf(temp+i,"%1x",x); 14 } 15 memcpy(sDest,temp,times); 16 } 17 int main() 18 { 19 char Hexstring[200]={0}; 20 char Binarystring[600]="010001100110110001101111011101110110010101110010011100110010000001100001011100100110010100100000011100110110111100100000011010010110111001100011011011110110111001110011011010010111001101110100011001010110111001110100001000010010000001000010011101010111010000100000010010010010000001110111011000010111001100100000011101000110111101101111001000000111100101101111011101010110111001100111001000000111010001101111001000000110101101101110011011110111011100100000011010000110111101110111001000000111010001101111001000000110110001101111011101100110010100100000011010000110010100101110"; 21 Bin2Hex(Binarystring,Hexstring,strlen(Binarystring)); 22 printf("二进制串长度：%d,二进制串：%s\n十六进制串长度：%d,十六进制串：%s\n",strlen(Binarystring),Binarystring,strlen(Hexstring),Hexstring); 23 return 0; 24 }
执行效果：
代码4：
1 #include<stdio.h> 2 #include<string.h> 3 //十六进制字符串转二进制字符串 4 void Hex2Bin(char *source,char *dest,int len) 5 { 6 int i=0; 7 char Dict[17][5] = 8 { 9 "0000", "0001", "0010", "0011", 10 "0100", "0101", "0110", "0111", 11 "1000", "1001", "1010", "1011", 12 "1100", "1101", "1110", "1111", 13 }; 14 for(i=0;i<len;i++){ 15 //char temp[5]={0}; 16 int n = 16; 17 if (source[i] >= 'a' && source[i] <= 'f') n = source[i] - 'a' + 10; 18 if (source[i] >= 'A' && source[i] <= 'F') n = source[i] - 'A' + 10; 19 if (source[i] >= '0' && source[i] <= '9') n = source[i] - '0'; 20 //sprintf(temp,"%s", Dict[n]); 21 //memcpy(&dest[i*4],temp,4); 22 memcpy(&dest[i*4],Dict[n],4); 23 } 24 return; 25 } 26 27 int main() 28 { 29 char Hexstring[64]="14a57bcf39\0"; 30 char Binarystring[256]={0}; 31 Hex2Bin(Hexstring,Binarystring,strlen(Hexstring)); 32 printf("十六进制串长度：%d十六进制串：%s,\n二进制串长度：%d,二进制串：",strlen(Hexstring),Hexstring,strlen(Binarystring)); 33 puts(Binarystring); 34 return 0; 35 }
执行效果：
代码5：最后，来一个等长二进制字符串异或函数
1 #include<stdio.h> 2 #include<string.h> 3 //等长比特字符串异或 4 int OZ_bin_xor( const char *s1, char *s2, char *dest) 5 { 6 int i; 7 int temp1=0,temp2=0,temp3=0; 8 if(strlen(s1)!=strlen(s2)) 9 { 10 printf("错误，不等长！\n"); 11 return 1; 12 } 13 for( i = 0; i < strlen(s1); i++ ) 14 { 15 temp1=s1[i]-'0'; 16 temp2=s2[i]-'0'; 17 temp3=temp1^temp2; 18 if(temp3==1) 19 dest[i]='1'; 20 else if(temp3==0) 21 dest[i]='0'; 22 else{ 23 printf("字符串内容有误！\n"); 24 return 1; 25 } 26 } 27 return 0; 28 } 29 int main(int argc, char const *argv[]) 30 { 31 char s1[10]="1001011\0"; 32 char s2[10]="0111010\0"; 33 char s3[10]={0}; 34 if(OZ_bin_xor(s1,s2,s3)!=0) 35 { 36 printf("函数出错！\n"); 37 return 1; 38 } 39 puts(s1); 40 puts(s2); 41 puts(s3); 42 return 0; 43 }
执行效果：
Have Fun！
