English 中文(简体)
浮动部分:目标-C
原标题:Get Whole number part of a float :Objective-C

因此

float x = x + 0.25;

每当发生点击时,该浮标就会被称作。

NS Carlo(@%f),x

我只想把那部分数字回来。

  x        return        

 1.25         1
 1.50         1
 3.25         3
 4.75         4

任何想法?

最佳回答

如果浮动点号码不在<代码>int的范围之内,则转至int

印刷%.0f”.n truncate, 编号4.75, 将作为5<>。

如果您的汇编者(更准确地说,您的运行时间图书馆)支持他们,则trunc(,truncf()和truncl(Function,在<math.h>上,确实需要:

printf("%.0f
", trunc(x));

这些职能在99年是新的,因此,您的汇编者可能不支持这些职能。 C90的确提供了<代码>底线()功能;如果你为负数写了某些特别案例代码,你可以使用。

问题回答

You can treat x as an int (cast):

NSLog("%d", (int)x);

注:这不会四舍五入,而是将价值缩减,只退回到ger。

EDIT:请指出,这并不是对所有可能的浮动价值进行分类的一种安全方法,它将通过(符合t的)小型价值进行罚款。





相关问题
Fastest method for running a binary search on a file in C?

For example, let s say I want to find a particular word or number in a file. The contents are in sorted order (obviously). Since I want to run a binary search on the file, it seems like a real waste ...

Print possible strings created from a Number

Given a 10 digit Telephone Number, we have to print all possible strings created from that. The mapping of the numbers is the one as exactly on a phone s keypad. i.e. for 1,0-> No Letter for 2->...

Tips for debugging a made-for-linux application on windows?

I m trying to find the source of a bug I have found in an open-source application. I have managed to get a build up and running on my Windows machine, but I m having trouble finding the spot in the ...

Trying to split by two delimiters and it doesn t work - C

I wrote below code to readin line by line from stdin ex. city=Boston;city=New York;city=Chicago and then split each line by ; delimiter and print each record. Then in yet another loop I try to ...

Good, free, easy-to-use C graphics libraries? [closed]

I was wondering if there were any good free graphics libraries for C that are easy to use? It s for plotting 2d and 3d graphs and then saving to a file. It s on a Linux system and there s no gnuplot ...

Encoding, decoding an integer to a char array

Please note that this is not homework and i did search before starting this new thread. I got Store an int in a char array? I was looking for an answer but didn t get any satisfactory answer in the ...

热门标签