- (IBAction)onclik:(id)sender {
NSString *a2=self.a.text;
NSString *a1=self.b.text;
int ab = [a1 intValue];
int bw = [a2 intValue];
int daan1=ab+bw;
NSLog(@"%d%d%d",daan1,bw,ab);
self.daan.text=@"％d",daan1;
}
报错：expression result unused