Common programming mistakes

We  discuss here some common mistakes which we do during programming.Here are the same list of these type of mistakes:-

(1)When we passing a pointer to a function which is  a pointer for array then there is no need to do malloc again then we allocate a new memory which is pointed by that poniter.Example:-
int* f1(int* );

void main()
{
int valueforb = 10;
int *bb = (int*)malloc(size*sizeof(int));
for(long unsigned int iterator = 0 ;iterator < size;iterator++)
{
bb[iterator]= valueforb ;
valueforb+=2;
}
f1(bb);
_getch();
}
int* f1(int* b)

{
        *b = (int*)malloc(size*sizeof(int));
for(long unsigned int iterator = 0;  iterator < size ; iterator++)
{
printf("%d  ",b[iterator]);
}
return b;
}


(2)Compatibility of various datatypes and modifiers:-If we don't know which  modifier used with which datatype it causes a big trouble.So we can understand it by these link:
http://amarsinghbishen007.blogspot.in/2013/03/compatibility-of-various-data-types-and.html

(3)Unusual behaviour of signed and unsigned modifier with float:-Here is a link which describe us about this problem:-
http://amarsinghbishen007.blogspot.in/2013/03/unusual-behaviour-of-signed-and.html

(4)Right Shift of signed,unsigned char & int:-Here is a link which describe us about this problem:-
http://amarsinghbishen007.blogspot.in/2013/02/right-shift-of-signedunsigned-char-int.html

(5)using shift operator:-Here is a link which describe us about this problem:-http://amarsinghbishen007.blogspot.in/2013/01/shift-operator-signedunsigned.html

(6)We need to be very careful in giving a path for the file because if we left a \ (slash ) only then it does not give an error .We are unable to understand which type of error occurred .