ANSWER THIS:: C,C++ Questions

1)Which is faster and why
for(i=0;i<1000;i++) or for(i=1000;i>=0;i--)

2)how can we include other than a .h using #include

3)which is faster and why

fun(typedef struct a X) or fun(typedef struct a *pX)

4)how can we print "HELLO WORLD" with out using semicolon

5) what is the purpose of volatile modeifier

6) how can we avoid multiple enteries of files included by #include

6)why is enum is better compared to #define constant