Question

I cannot figure out how to get the function to work in separate source files in C++

Given that arrayIntValues [MAX_ROWS][MAX_COLUMNS] is a 2 dimensional array of positive integers, write a C++ function howManyEven to find the total number of even elements in the array. It should have input parameter array arrayIntValues. The function should return an integer. Also create a C++ function called printArray, with the input parameter array arrayIntValues, to print out the elements in the array (be sure to have row and column labels and proper formatting (i.e. column values line up).

Main must be in one source file and all other functions in a second source file.

The constants MAX_ROWS and MAX_COLUMNS must be accessed globally by defining the following global variables:const int MAX_ROWS = 3;or#define MAX_ROWS 3const int MAX_COLUMNS = 2;or#define MAX_COLUMNS 2The array arrayIntValues is initialized by the following statement within main():int arrayIntValues [MAX_ROWS][ MAX_COLUMNS] = { {3 , 2}, {4, 5}, {2, 2} };

Print out the array and the count of positive even numbers (label appropriately) in function printArray.

Answer 1

Hey There!

The solution is pretty easy.

Step 1: Create a folder, inside create a file as "ARRAYFUNCTIONS.h".

Code for the file :

ARRAYFUNCTIONS.h

#include<iostream> #ifndef ARRAYFUNCTIONS #define ARRAYFUNCTIONS #define MAX_COLUMNS 2 #define MAX_ROWS 3 int howManyEven(int arrIntValues[][MAX_COLUMNS]){     int count = 0,i,j;     for(i=0;i<MAX_ROWS;i++){         for(j=0;j<MAX_COLUMNS;j++){             if(arrIntValues[i][j] % 2 == 0){                 count += 1;             }         }     }     return count; } void printArray(int arrIntValues[][MAX_COLUMNS]){     int i,j;     std::cout<<"The 2-D array is :"<<std::endl;     for(i=0;i<MAX_ROWS;i++){         for(j=0;j<MAX_COLUMNS;j++){             std::cout<<arrIntValues[i][j]<<" ";         }         std::cout<<std::endl;     } } #endif

Step 2: In the same folder, add another file named as "mainFunction.cpp".

Code:

mainFunction.cpp

#include "ARRAYFUNCTIONS.h" using namespace std; int main(){     int arrayIntValues [MAX_ROWS][ MAX_COLUMNS] = { {3 , 2}, {4, 5}, {2, 2} };     printArray(arrayIntValues);     cout<<"Even number is the array : "<<howManyEven(arrayIntValues)<<endl; }

Step 3: Save these files.

Step 4: Compile the header file with the command.

Step 5: Compile the main file with the command.

Step 6: Run the generated file.

The Output is something like this:

Comment for more help.

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