小数处理 四舍五入 tip

小数处理 四舍五入

NSLog(@"%f",round(12345.6749*100)/100);//12345.670000  
NSNumber *num = [NSNumber numberWithFloat:12.1250];
NSLog(@"%@",[NSString stringWithFormat:@"%.2f",round([num floatValue]*100)/100]);//12.13```