What ledow was saying is that 'C' is different from "C", the first is a character, the second is a string containing a single character. (ie you would write "ABC", not 'ABC')
In your code you want to compare the character to another character not to a string, and as previously stated == is not used for string comparison anyway, the function strcmp() is.
1. Get rid of gets(). Never ever ever use it again. Replace it with fgets() and use that instead.
2. Get rid of void main and replace it with int main(void) and return 0 at the end of the function.
3. Get rid of conio.h and other antiquated DOS crap headers.
4. Don't cast the return value of malloc, even if you always always always make sure that stdlib.h is included.
