My sister forced me to write a Turbo C program.
Where i the user can do the following:
a. convert a decimal to octal
b. Convert an octal to decimal
c. convert a decimal to hex
d. convert a hex to decimal

After thinking so many things. And formulating a lot of loops, trying to find out if turbo c has midstrig function that can extract each numbers.
Hehehe it seems to me that i complicate things.

This is the output program after reading books on turbo c:

#include<stdio.h>
main()
{

char choice;
int val;

printf(“Please Enter your Choice”);
printf(“(1) Decimal to Octal”);
printf(“(2) Octal to Decimal”);
printf(“(3) Decimal to Hex”);
printf(“(4) Hex to Decimal”);

choice=getche();

case (1):
printf(“Please Enter a decimal value to convert”);
scanf(“%d, &val “);
printf(“The octal value is %o”, val);
break;

case (2):
printf(“Please Enter an octal value to convert”);
scanf(“%o, &val “);
printf(“The decimal value is %d”, val);
break;

case (3):
printf(“Please Enter a decimal value to convert”);
scanf(“%d, &val “);
printf(“The hex value is %x”, val);
break;

case (4):
printf(“Please Enter a hex value to convert”);
scanf(“%x, &val “);
printf(“The octal value is %d”, val);
break;

default:
printf(“Input Error”);

}

i have learned that turbo c has a format converter for printf and scanf. So it is easy to convert to different number system.
Unlike assembly language that you have to control by bits hehehe.