Convert to Float and Calculate

Question

I have a string with multiple digits and operators

@\"5+4-9/10\".

How to get the result from it?

I want to use it within the calculator

Answer 1

You could parse "all" numbers to float:

NSMutableString *numericExpression = [NSMutableString stringWithString:@"4+3/2-7/4"];

NSMutableString *nExp=[NSMutableString stringWithString:@""];
BOOL innum=false;
BOOL dotfound=false;

for (NSInteger charIdx=0; charIdx