ACIUCFL - Avoid Complex Initialization or Update Clause in For Loops

When using the comma operator in the initialization or update clause of a `for` statement, avoid the complexity of using more than three variables.

Wrong

`for ( i = 0, j=0, k=10, l=-1 ; i < cnt;
i++, j++, k--, l += 2 ) {
// do something
}
`

Tip: If needed, use separate statements before the `for` loop (for the initialization clause) or at the end of the loop (for the update clause).

Right

`l=-1;
for ( i = 0, j=0, k=10; i < cnt;
i++, j++, k-- ) {
// do something
l += 2;
}
`

``