Always write if statements with braces

By putting braces around every block of code you write, you ensure that future edits won't introduce bizarre bugs.
If you have a one-line if statement:
if(<condition>)

    execute();

you should still surround

execute();

with braces:

if(<condition>)

{

    execute();

}

Now, if you go back and add a second instruction

if(<condition>)

{

    execute();

    execute2();

}

you don't have to worry about putting in the braces, and you know that you won't forget to put them in.

Put braces around if statement code, part 2

 

Try out this little program and you will realise that braces need to be put after the if statement.

 int main()

{

    int a=0;

    if(a!=0)

        #define a 5

        printf("%d",a);

    return 0;

}