" Issue 6 " : Pushback And Resize

[coder-Retro]

Issue 6: Implement Push_back() & Resize()

Task Description:

In 2nd last issue (issue 4), we learnt how we can insert an element into a vector using the push_back() method. Now, we will learn how to implement this push_back method along with resize method. In this issue, each member will work on the same file so there will be merge conflicts. Now about pushback and resize:

Push_back:

When your pushback is called it should take an int value as argument and insert that value into the vector while also updating len to len+1, also if vector is already full (len==cap) then resize shall be called before inserting the value.

Resize:

When resize is called, the vector shall double its capacity to create more space. If cap is 0, it should become 1, if it is non-zero, then it shall be doubled.

Target File:

For this issue, you will be working on the following file:

dsa/pushback_and_resize.cpp

File Structure:

Your file will look like this:

#include<iostream>
using namespace std;

// Vector class
class vector {
private:
    // Dont rename these variables
    int* ptr;
    int cap;
    int len;
public:
    vector(int cap=0) : ptr(nullptr), cap(cap), len(0) {}
    
    // Replace yourName with your mentioned name in Issue Description:
    void pushback_yourName(int value) {
        // Your Code Here
    }

    // Replace yourName with your mentioned name in Issue Description:
    void resize_yourName() {
        // Your Code Here
    }

    // Dont Touch Anything Else in this Vector Class.
    int size()const            { return len;        }
    int capacity()const        { return cap;        }
    int& operator[](int index) { return ptr[index]; }
    ~vector() { delete[] ptr; }
};

// Uncomment your respective lines in main function

// Main Function
int main() {

    // Vector Objects of size 0
    vector v1,v2,v3,v4,v5,v6,v7;

    // Initial Sizes
    cout<<"Initial Sizes (Empty Vectors) :\n";
    // cout<<"Awais    vector size: "<<v1.size()<<'\n';
    // cout<<"Kaido    vector size: "<<v2.size()<<'\n';
    // cout<<"Talha    vector size: "<<v3.size()<<'\n';
    // cout<<"Velanora vector size: "<<v4.size()<<'\n';
    // cout<<"Waleeja  vector size: "<<v5.size()<<'\n';
    // cout<<"Easha    vector size: "<<v6.size()<<'\n';
    // cout<<"Areeba   vector size: "<<v7.size()<<'\n';

    // Calling pushbacks
    cout<<"\nPushing Values :\n";
    // v1.pushback_awais    (250011);
    // v2.pushback_kaido    (253015);
    // v3.pushback_talha    (250027);
    // v4.pushback_velanora (250014);
    // v5.pushback_waleeja  (250005);
    // v6.pushback_easha    (250064);
    // v7.pushback_areeba   (250056);

    // Resized After push backs
    cout<<"\nSize Increased :\n";
    // cout<<"Awais    vector size: "<<v1.size()<<'\n';
    // cout<<"Kaido    vector size: "<<v2.size()<<'\n';
    // cout<<"Talha    vector size: "<<v3.size()<<'\n';
    // cout<<"Velanora vector size: "<<v4.size()<<'\n';
    // cout<<"Waleeja  vector size: "<<v5.size()<<'\n';
    // cout<<"Easha    vector size: "<<v6.size()<<'\n';
    // cout<<"Areeba   vector size: "<<v7.size()<<'\n';

    // Printing Values;
    cout<<"\nPrinting Values :\n";
    // cout<<"Awais    : "<<v1[0]<<'\n';
    // cout<<"Kaido    : "<<v2[0]<<'\n';
    // cout<<"Talha    : "<<v3[0]<<'\n';
    // cout<<"velanora : "<<v4[0]<<'\n';
    // cout<<"waleeja  : "<<v5[0]<<'\n';
    // cout<<"easha    : "<<v6[0]<<'\n';
    // cout<<"areeba   : "<<v7[0]<<'\n';

    return 0;
}

Guidelines:

When you start writing your pushback_yourName function, first and foremost replace "yourName" with your respective name as mentioned in here:

• pushback_awais
• pushback_kaido
• pushback_talha
• pushback_velanora
• pushback_waleeja
• pushback_easha
• pushback_areeba

Do the same for for resize_yourName as well.

Important Note:

• Do Not Submit Ai Generated Codes!
• Make sure there are no memory leaks in your resize function.
• Make sure you uncomment your respective lines in main function before pushing to github.
• Do not rename the pushback_And_resize.cpp file to anything else.
• Before submitting your PR, make sure you delete the executable file and leave only cpp file.
• Do not read other's functions in their PR.