program to convert hexadecimal to decimal

/* program to convert number from hexadecimal to decimal*/

#include <stdio.h>

#include <string.h>

#include <math.h>

void main()

{

    char hex[32]={0};

    int  dec = 0, i, cnt = 0, dig;

    clrscr();

    printf("Enter hexa decimal value: ");

    gets(hex);

    for(i=(strlen(hex)-1);i>=0;i--)

    {

        switch(hex[i])

        {

            case 'A':

                dig=10; break;

            case 'B':

                dig=11; break;

            case 'C':

                dig=12; break;

            case 'D':

                dig=13; break;

            case 'E':

                dig=14; break;

            case 'F':

                dig=15; break;

            default:

                dig=hex[i]-48;

        }

        dec= dec + (dig)*pow((double)16,(double)cnt);

        cnt++;

    }

    printf("DECIMAL value is: %d", dec);

    getch();

}