for loop elements to array

[dancivuk]

hey all, just a quick question. how exactly do i add elements from a for loop to an array?

[Chervil]

That doesn't sound very clear, perhaps you might explain what problem you are trying to solve. Or show the code you have so far and where you are getting stuck.

[dancivuk]

let's say i have a for loop: for(int i=1;i<=5;i++). and i want to add 1,2,3,4,5 to an array, let's say int Arr[4]. how do i go about doing that? i have some failed attempts, most of the time i get a random number when i print the array

[naaissus]

Indexing starts from 0.

int Arr[4];
for (int i = 0; i < 5; i++) // indexing starts from 0 and ends with 4
   Arr[i] = i + 1;

Elements: 1, 2, 3, 4

http://www.cplusplus.com/doc/tutorial/arrays/
http://www.tutorialspoint.com/cplusplus/cpp_arrays.htm

[chicofeo]

To give you and idea on how to add the elements manually into an array by using the for loop.

#include <iostream>

//Function Prototypes.
void InputIntoArray(int[], int);
void OutputFromArray(int[], int);

int main()
{
    const int SIZE{ 5 }; //Declare and define the size of the array.
    int ArrNum[SIZE]{0}; //Declare and define the values into the array, which is zero.

    InputIntoArray(ArrNum, SIZE); //Call the first function to ask the user to input the integers.
    OutputFromArray(ArrNum, SIZE); //Call the first function to ask the user to output the integers.

    return 0;
}

//This function runs a for loop in accordance
//with the size of the array (variable :sz)
//to obtain the input from the user.
void InputIntoArray(int arrayNumber[], int sz)
{
    std::cout << "Input an integer number " << sz << " times.\n";
    for (int count = 0; count < sz; count++)
    {
	   std::cout << "Number " << count + 1 << ": ";
	   std::cin >> arrayNumber[count];

    }
}
//This function runs a for loop in accordance
//with the size of the array (variable :sz)
//to obtain the output from the user.
void OutputFromArray(int arrayNumber[], int sz)
{
    std::cout << "Outputting the numbers you inputted...\n";
    for (int count = 0; count < sz; count++)
    {
	   std::cout << "Number " << count + 1 << ": ";
	   std::cout << arrayNumber[count];
	   std::cout << std::endl;

    }
}

[dancivuk]

that helps, thanks!