Using ASP Classic, write a function to convert Hexadecimal to ASCII format

Question

Using ASP Classic, write a function to convert Hexadecimal to ASCII format.

Example input: '3132', example output: '12'

Example input: '313030', example output: '100'

Answer 1

using namespace std;

#include <iostream>

int HexChar2Int( char chHexDigit)

{

int iReturn=-1;

switch (chHexDigit)

{

case '0': { iReturn=0; break; }

case '1': { iReturn=1; break; }

case '2': { iReturn=2; break; }

case '3': { iReturn=3; break; }

case '4': { iReturn=4; break; }

case '5': { iReturn=5; break; }

case '6': { iReturn=6; break; }

case '7': { iReturn=7; break; }

case '8': { iReturn=8; break; }

case '9': { iReturn=9; break; }

case 'A': { iReturn=10; break; }

case 'B': { iReturn=11; break; }

case 'C': { iReturn=12; break; }

case 'D': { iReturn=13; break; }

case 'E': { iReturn=14; break; }

case 'F': { iReturn=15; break; }

default: { break; }

}

return(iReturn);

}

int HexByte2Int( char hex[2])

{

int highByte = HexChar2Int(hex[0]);

int lowByte = HexChar2Int(hex[1]);

return( highByte*16+lowByte);

}

void Hex2Ascii ( char * hexBuff, char * asciiStr)

{

char * curPtr = hexBuff;

char * outputPos = asciiStr;

char hex[2];

while (*curPtr!=0)

{

hex[0]= *curPtr;

hex[1]=*(curPtr+1);

int iChar = HexByte2Int(hex);

*outputPos = char(iChar);

outputPos++;

curPtr+=2;

}

}

int main()

{

char hexStr[1000];

char str[500];

cout << " Input the hex string :>";

cin >> hexStr;

Hex2Ascii(hexStr,str);

cout << str << endl;

}