C ++用const变量定义数组大小

问题描述

int place = determinePlace(input);

const int arraySize = (place + 1);
int decimal[arraySize] = {};

嗨！

我试图使用const int变量来定义十进制[]的数组大小.但是，错误C2057和错误C2466继续出现.

I tried to use a const int variable to define the array size of decimal[].However, error C2057 and error C2466 keeps on coming up.

有什么建议吗?

推荐答案

Joachim是对的，您正在尝试设置:

Joachim is right,you are trying to set:

const int arraySize = (determinePlace(input) + 1);

这是行不通的，因为您试图获取用户输入或类似内容，而这些内容只能在运行程序时才能访问，而在编译时则无法访问.

this doesn't work, because you are trying to get a user input or something similar which will be only accessible when you run the program not when you compile it.

我会尝试这样的事情:

#include <vector>

using std::vector;

vector<int> decimal;
decimal.resize(determinePlace(input) +1);
decimal = {};

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