Thread: Please Help!

I'm trying to do an assignment and I keep getting an error on my code that says "line 36: unrecognised types in comparison
'while ( dep_OR_withdraw != 0 ) { printf("\nEnter deposit (+) or withdrawal (-): ")' aborting compile". This is what I have and I can't figure out what is wrong.

Code:

currentBalance = initialBalance;
dep_OR_withdraw = 1; /*Dummy value used to get the loop started*/
	
	while ( dep_OR_withdraw != 0 ) {
		printf("\nEnter deposit (+) or withdrawal (-): ");
		scanf("%f", &dep_OR_withdraw);
			if (currentBalance < 0) {
				printf("\n**I am sorry.  You bounced your check.");
				printf("$10 will be deducted.");
				currentBalance = currentBalance + dep_OR_withdraw - FEE;
			}
			else
				currentBalance = currentBalance + dep_OR_withdraw;
		printf("Current Balance: %.2f", currentBalance);
	}

All the variables were declared as floats except for FEE which is a constant of 10. I'm trying to balance a checkbook in the program. My compiler is Miracle C and I have no idea what OS means. I'm taking an introductory course of C and this is the first program I have tried to write using selection statements or loops. I'll probably just try to write this again a different way, but I was hoping that maybe there was just some obvious little error that somebody would notice who knows what they are doing. The whole program is obviously not written well though! Please post if you have any tips that might help. Thanks.