NSMutableArray *ar = [[NSMutableArray alloc]init];
NSLog(@"%d",((int)[ar count]-1)>100?1:0);
NSLog(@"%d",([ar count]-1)>100?1:0);
还是要记住无符号整型在for循环中,若有可能出现减法情况,一定要先转成有符号整数。
NSMutableArray *ar = [[NSMutableArray alloc]init];
NSLog(@"%d",((int)[ar count]-1)>100?1:0);
NSLog(@"%d",([ar count]-1)>100?1:0);
还是要记住无符号整型在for循环中,若有可能出现减法情况,一定要先转成有符号整数。