一次递增所有数组元素1 [英] incrementing all array elements at a time by 1

问题描述

如何一次递增数组元素1 ...即

i有一个数组作为数组[1,2,3,4,5]，是否有内置函数（或者在java或C）中，每次增加或减少
，变为数组[2,3,4,5,6]。

How to increment array elements at a time by 1...i.e
i have an array as array[1,2,3,4,5], is there any built in function(either in java or C) to increment or decrement
by 1 at a time which becomes as array[2,3,4,5,6].

推荐答案

没有这样的'内置'函数（至少在 C 中，我相信 Java 也没有这样的功能）可能是因为正如 ridoy 正确指出的那样，你可以自己轻松地实现它。

There is not such a 'built-in' function (at least in C, I believe Java has not such a function too) possibly because, as ridoy correctly pointed out, you may easily implement it yourself.

我不知道你为什么搜索内置函数来执行此操作，因为只有2行代码将获得所需的代码。看看它是如何完成的：

I don't know why you are searching for a built in function to do this as only 2 lines of code will get the desired code.Look how it could be done:

int[] myArray = {1,2,3,4,5};
int temp=0;

for(int i=0; i<myArray.length; i++)
{
    temp = myArray[i]+1;
    myArray[i] = temp;
}
//your array value was changed above,now see exactly it works or not!
for(int k=0; k < myArray.length; k++)
System.out.println(myArray[k]);

Output:
2,3,4,5,6

希望对您有所帮助。



干杯！

Shuvro

Hope that will help you.

Cheers!
Shuvro

在C ++中你可以使用类 std :: valarray 。它类似于 std :: vector ，但定义了许多单独修改每个元素的标准运算符。查看 http://www.cplusplus.com/reference/valarray/valarray/operators/ [ ^ ]作为参考;它还包括一些示例代码。



对于递增数组，你可以写e。 g。：

In C++ you can use the class std::valarray. It is similar to std::vector, but defines a number of standard operators that modify each element individually. check out http://www.cplusplus.com/reference/valarray/valarray/operators/[^] as a reference; it also includes some example code.

For incrementing an array you could write e. g.:

#include <valarray>     // std::valarray

void foo ()
{
  int myarray[]= {10,20,30,40};

  std::valarray<int> bar (myarray, 4);  //  10 20 30 40

  bar += 1; // 11 21 31 41
}

PS：

如果在Windows中使用此类，则会发出警告：某些标准Windows头文件 #defines 宏 min（）和 max（），这将会破坏函数 std :: valarray :: min（）和 std :: valarray :: max（）如果包括的valarray 。你可以用各种方式防止这种情况：

1.使用 #undef 来杀死这些定义

2.使用 #define NOMINMAX 在包含windows标题之前阻止他们的定义

3. #include valarray 首先



（我讨厌 #define的原因中的一个<= code>！）

P.S.:
A word of warning if you use this class in Windows: some standard windows header file #defines the macros min() and max(), which will nuke the functions std::valarray::min() and std::valarray::max() if included before you include valarray. You can prevent this in various manners:
1. use #undef to kill these definitions
2. use #define NOMINMAX before including the windows headers to prevent their definition
3. #include valarray first

(Just one of the many reasons why I hate #define !)

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