//------------------------------------------------
#pragma argsused

int CharToInt(char alpha)
{
if(alpha<58 )
return alpha - 48;
else
return alpha - 55;
}

int ConvertToDec(char *input , int sinp )
{
int sum = 0;
int pow = 1;
for(int i = strlen(input)-1; i>=0; i--)
{
sum+=CharToInt(input[i]) * pow;
pow*=sinp;
}
return sum ;
}

char *convertX(int input, int sout, char *out)
{
while(input!=0)
{
byte j = input%sout;
input/=sout;
out--;
if(j<10)
*out = 48 + j;
else
*out = 55 + j;
}
return out;
}

int main(int argc, char* argv[])
{
printf("Vvedite iszhodnoe chislo: " );
char input[32] = "";
scanf("%s", &input);

printf("\nVvedite nachalnuiu codirovku: ");
int sinp;
scanf("%i", &sinp);

printf("\nVvedite conechnuiu codirovku: ");
int sout;
scanf("%i", &sout);

printf("\n\n= ");

char output[32];
output[31] = 0;
printf("%s", convertX(ConvertToDec(input, sinp), sout, output+31));

printf("\n\nNazsmite ljubuju klavisu...");
getch();
return 0;
}