CODEWITHSUNDEEP
c++arraysrandom
user1582575
user1582575

Reputation: 89

Populating an array

Can you help me with a problem on populating an array of 5 circles with random numbers. The random number would be the radius of the circles. Here is my code:

#include <iostream>
#include <time.h>
using namespace std;

int main()
{
    // Array 2, below section is to populate the array with random radius
    float CircleArrayTwo [5]; // store the numbers
    const int NUM = 5; // Display 5 random numbers

    srand(time(NULL)); // seed the generator

    for(int i = 0; i < NUM; ++i)
    {
        CircleArrayTwo[i] = rand()%10;
    }

    cout << "Below is the radius each of the five circles in the second array. " <<   endl;
    cout << CircleArrayTwo << endl;

    system("PAUSE");
    return 0;
}

Currently is output the following:

Below is the radius each of the five circles in the second array. 002CF878

Where am I going wrong?

Any help is much appreciated

Upvotes: 1

Views: 2410

Answers (4)

keyboarddrummer
keyboarddrummer

Reputation: 156

CircleArrayTwo is a pointer. When you print a pointer, it prints a memory address, like the one you provided. In order to print the values of an array, you need to use the [] notation that you have for the insert.

You could loop over the values in the array and print each one:
for (int i = 0; i < NUM; ++i) { cout << CircleArrayTwo[i] << endl; }

Upvotes: -1

Alexander Putilin
Alexander Putilin

Reputation: 2342

In C(and C++) arrays are almost equivalent to pointers to the beginning of memory location. So you're just outputting the adress of the first element; To output all elements introduce another loop:

for(int i = 0; i < NUM; ++i) 
{
    cout << CircleArrayTwo[i] << endl;
}

Upvotes: 0

Todd Li
Todd Li

Reputation: 3269

The way you populated the array is correct, however you cannot print an array like that. You need to write a loop to output the values one by one.

Upvotes: 1

juanchopanza
juanchopanza

Reputation: 227370

You are printing the address of the first element of the array. You could loop over the array and print each element:

for(int i = 0; i < NUM; ++i)
{
    std::cout << CircleArrayTwo[i] << ", ";
}
std::cout << "\n";

Or, if you have C++11 support,

for (auto& x : CircleArrayTwo) {
   std::cout << x << ", ";
}    
std::cout << "\n";

Upvotes: 5

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