string vs char pointer

accept

The difference here is that char *s = "Hello world"; will place Hello world in the read-only parts of the memory and making s a pointer to that, making any writing operation on this memory illegal. While doing: char s[] = "Hello world"; puts the literal string in read-only memory and copies the string to newly allocated memory on the stack. Thus making s[0] = 'J'; legal.

c program

compiler like gcc look for header files with brackets <> in standard paths like:

/user/include

/user/local/include

for other header files(#include"current.h") it look for in the current directory first & after that in standard path 

tricky c questions

http://www.thegeekstuff.com/2012/08/c-interview-questions/

http://www.sanfoundry.com/touch-c-programming-questions-goto-labels/

http://www.cquestions.com/2011/12/tough-c-interview-questions.html

http://chinswe.webs.com/toughestcquestion.htm