在目标C中浮点数到字符串的转换

Question

I am converting float to string using this method

    -(NSString*)FloatToStr:(float)floatVal
      {
            NSString *string;
            string=[NSString stringWithFormat:@"%0.02f",floatVal];
            return string;
      }

    float x=15.625;
    NSLog(@"c==>%@",[self FloatToStr:x]);

    //Output:15.62

it gives the 15.62, but i want 15.63.

Answer 1

In your code you are truncating the number to two decimals positions. If you want to round to two decimals, make this before to convert to string.

-(NSString*)FloatToStr:(float)floatVal
{
NSString *string;
string=[NSString stringWithFormat:@"%0.02f",roundf(floatVal*100)/100];
return string;
}