Tertiary operators
From ROBOTC API Guide
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| − | value = (boolean statement) ? ( /* value if statement is true */ ) : ( /* value if statement is false */ ); | + | value = ( /*boolean statement*/ ) ? ( /*value if statement is true*/ ) : ( /*value if statement is false*/ ); |
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Latest revision as of 08:59, 10 August 2012
General Programming → Programming Tips Tricks → Tertiary Operators
A ternary operation will look something like this:
value = ( /*boolean statement*/ ) ? ( /*value if statement is true*/ ) : ( /*value if statement is false*/ ); |
So in a real world example:
motor[port2] = abs(vexRT[Ch2]) > 10 ? vexRT[Ch2] : 0; |
In contrast to this, the if else statement would look like this:
if(abs(vexRT[Ch2]) > 10)){ motor[port2] = vexRT[Ch2]; }else{ motor[port2] = 0; } |
You can also nest ternary statements. For example, if you wanted to say: move the motor forward at the value of the joystick if it is positive and above the threshold value, but move the motor backward at 1/2 joystick value of it is negative and below the threshold value, then you can nest the ternary statements to make a if else if else statement.
motor[port2] = vexRT[Ch2] > 10 ? vexRT[Ch2] : vexRT[Ch2 < -10 ? (vexRT[Ch2] / 2) : 0; |
This tip was posted by magicode over at http://www.vexforum.com/showpost.php?p=220747&postcount=2.
