为什么我不能将ifstream变量作为参数传递给函数

Question

我可以在函数外运行第一个部分，但当我尝试在函数中使用ifstream对象运行代码时，我会收到以下错误：

operator>>不匹配(操作数类型为std::ifstream(也称为std::basic_ifstream<char>｝和const int(

常量和标头

#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
const int COLS = 5; //Declaring constant number of cols
const int ROWS = 7; //Declaring constant number of rows
const string FILENAME = "foodDrive.txt";
//Function Prototypes

以下作品：

int main()
{
int food[ROWS][COLS] = {0}; //declaring 2D array that will hold values
ifstream inFile;
inFile.open(FILENAME);
for (int r = 0; r < ROWS; r++) //Outer loop for rows
{
for (int c = 0; c < COLS; c++) //inner loop for columns
{
inFile >> food[r][c];  //Take input from file and put into food
}
}
inFile.close();

但这不是

void readArray(const int ary[][COLS],int rows)
{
ifstream inFile;
inFile.open(FILENAME);
for (int r = 0; r < rows; r++) //Outer loop for rows
{
for (int c = 0; c < COLS; c++) //inner loop for columns
{
inFile >> ary[r][c];  //Take input from file and put into food
}
}
inFile.close();
}

Answer 1

删除函数头中的const，我想这应该会有所帮助：

void readArray(int ary[][COLS], int rows) { ...