Possible to break up a statement into multiple lines?

Question

I'm currently in an extremely basic C++ class and we are writing a program to check if an input is a string or has digits within it. I currently have my code and everything seems to be in order however, when I attempt to test it I get the error:

Line should be less than or equal to 80 characters long.

The error location reveals this as the problem:

if ((checknum == 1 && checkVector[0] == 1)|| checknum == 0 || checknum == strlength) {

Is there any way to break this up into multiple lines to avoid this error? It will not let me run it without all of the white spaces.

Answer 1

You can put line breaks anywhere that whitespace is allowed:

if ((checknum == 1 && checkVector[0] == 1)||
     checknum == 0 || 
     checknum == strlength) {

Or you could set variables:

int check1 = checknum == 1 && checkVector[0] == 1;
int check2 = checknum == 0;
int check3 = checknum == strlength;
if (check1 || check2 || check3) {

This isn't exactly equivalent, because || performs short-circuiting, and doesn't bother evaluating later operands if an earlier operand is true. But since there are no side effects or expensive calculations in your expressions, the difference is negligible.