You can't assign anything inside a structure declaration. A structure declaration just defines a type. It's like a blueprint; you're telling the compiler, "if I ask you to create a Something, this is...

You could save the numbers as you find them instead of printing them, say in a char array, and then print that array in reverse. On the other hand, it would probably be better to use a different...

GCC doesn't like your code.
sort.c: In function ‘read_list’:
sort.c:13: warning: format ‘%s’ expects type ‘char *’, but argument 2 has type ‘int *’
sort.c: In function ‘insert_sort’:
sort.c:75:...

gotoxy() is an ancient Borland function. It's very unportable. No new code should use it or anything from <conio.h>, such as getch() or clrscr().


'a' is a single character. "a" is a string. Use...

It recommends Miracle C! . . . Miracle C is a very broken compiler, a very bad thing to recommend to new programmers.

Also see this FAQ: http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1048865140&id=1043284351

As andor mentioned:
Why not to use fflush(stdin): FAQ > Explanations of... > Why fflush(stdin) is wrong (http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1052863818&id=1043284351)
What to...

This page covers it a bit more thoroughly: http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1047673478&id=1043284351

(source[pos] >= '0' && source[pos] <= '9')
Look into isdigit() in <ctype.h>. And isalpha() or isupper()+islower() for the other lines nearby.

Have you every used getenv() before? . . . if not,...