Reading data from text file and highlighting users selection? - Programmers Heaven

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Reading data from text file and highlighting users selection?

I would be very greatful if someone could point me in the right direction. So far I have a program which reads in a series of currencies from a text file. When the user presses a key 1 to 9 a different currency is selected i.e. 1=British pound, 2=Euro. Depending upon the two numbers the rate is then calculated. I was wondering whether it is at all possible to highlight the users selection i.e. whenever they press 1 change the colour of the text British Pound, 2 Euro and so on. I presume it would go in either one of these functions but im not entirely sure. Any help though would be much appreciated.
[CODE]
void convert(void)
{

gotoxy(20,17);
printf("Select currency to convert from ");

from=(getch()-48);
while(from<1 || from>9)
from=(getch()-48);

gotoxy(20,17);
printf(" ");

gotoxy(20,17);
printf("Select currency to convert to ");

to=(getch()-48);
while(to<1 || to>9)
to=(getch()-48);

gotoxy(20,17);
printf(" ");
gotoxy(20,17);
printf("Enter amount: ");
amount=gfloat();

gotoxy(20,19);
printf("%1.2f",(amount/rates[from-1])*rates[to-1]);
//getch();
//system("cls");
pause();
}

void read_file(float *rates)
{
char buff[80];
int i;

i=0;
while(fgets(buff,80,fpin)!=NULL)
{ // x y
gotoxy(17,7+i);
printf("%d %s",i+1,buff);
gotoxy(42,7+i);
printf("%d %s",i+1,buff);
if(fgets(buff,80,fpin)!=NULL)
rates[i++]=(float)atof(buff);
}
fclose(fpin);
}

[CODE]

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