用C初始化数组下标具体项目++ [英] Initialize specific subscript item in array by c++

问题描述

可能重复：结果
  <一href=\"http://stackoverflow.com/questions/9048883/static-array-initialization-of-individual-elements-in-c\">Static在C ++中各个元素的数组初始化

在C，我可以在阵列像这样初始化具体项目标：

In C, I can initialize specific subscript item in array like this:

int array[100] = {[22] = {1}, [33] = {33}};

但这个片段不能用g ++编译。
所以我怎么能由C ++中的数组初始化特定标项目。

but this snippet can not compile by g++. so how can I initialize specific subscript item in array by c++.

推荐答案

下标初始化只允许在C和不是C ++。你可以在这里<一个检查的详细文档href=\"http://publib.boulder.ibm.com/infocenter/compbgpl/v9v111/index.jsp?topic=/com.ibm.xlcpp9.bg.doc/language_ref/aryin.htm\" rel=\"nofollow\">http://publib.boulder.ibm.com/infocenter/compbgpl/v9v111/index.jsp?topic=/com.ibm.xlcpp9.bg.doc/language_ref/aryin.htm

The subscript initialization is only allowed in C and not in C++. You can check the detailed documentation here http://publib.boulder.ibm.com/infocenter/compbgpl/v9v111/index.jsp?topic=/com.ibm.xlcpp9.bg.doc/language_ref/aryin.htm

如果您要初始化每个元素，你可以声明数组后，并在以下行初始化值做到这一点;

If you want to initialize each element, you can do it after declaring the array and in the following lines initializing the values;

#include<iostream>
using namespace std;

int main(){
    int arr[100];
    arr[22]=33;
    arr[33]=66;
    cout<<arr[22]<<"\t"<<arr[33];
    return 0;
}

它产生的输出如下：

It produces the following output:

$ ./a.exe
33      66

这篇关于用C初始化数组下标具体项目++的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！