Today I completed the eighth video in Babar's DSA Playlist. You can find the video here: Babar's DSA Playlist - Video 8.

This video was fantastic! It covered switch statements and functions in a way that made it so much easier for me to understand. Specifically, the problems related to switch statements were really helpful. I managed to solve both of them by myself:

1. Creating a simple calculator.

    #include<iostream>
   
    using namespace std;
   
    int main(){
        int a , b;
        char c;
   
        cout<<"Enter first Number: ";
        cin>>a;
        cout<<"Enter Second Number: ";
        cin>>b;
        cout<<"Enter operator: ";
        cin>>c;
   
        switch (c){
            case '+':
                cout<<(a+b)<<endl;
                break;
            case '-':
                cout<<(a-b)<<endl;
                break;
            case '/':
                cout<<(a/b)<<endl;
                break;
            case '*':
                cout<<(a*b)<<endl;
                break;
            case '%':
                cout<<(a%b)<<endl;
                break;
            default:
                cout<<"Enter a valid operator"<<endl;
        }
   
    }
   

2. Determining the number of notes in a given amount.

    #include<iostream>
   
    using namespace std;
   
    int main(){
        int amount;
        cout<<"Enter the amount";
        cin>>amount;
        int rs100,rs50,rs20,rs1;
   
        switch(1){
            case 1 :{
                rs100=amount/100;
                amount=amount%100;
                cout<<"Number of 100 rs notes "<<rs100<<endl;
            }
            case 2 :{
                rs50=amount/50;
                amount=amount%50;
                cout<<"Number of 50 rs notes "<<rs50<<endl;
            }
            case 3 :{
                rs20=amount/20;
                amount=amount%20;
                cout<<"Number of 20 rs notes "<<rs20<<endl;
            }
            case 4 :{
                rs1=amount/1;
                amount=amount%1;
                cout<<"Number of 1 rs notes "<<rs1<<endl;
            }
        }
    }
   

After that, I started with functions. Alongside the video, I solved questions related to nCr and even or odd number, which helped to understand and implement functions

//nCr

#include<iostream>

using namespace std;

int factorial (int n){
    int fact = 1;

    for(int i = 1; i<=n;i++){
        fact=fact*i;
    }
    return fact;
}

int ncr(int n, int r){
    int num = factorial(n);
    int denom = factorial(r)*factorial(n-r);

    return num/denom;
}

int main(){
    int n,r;
    cin>>n>>r;
    cout<<"Anuswer "<<ncr(n,r)<<endl;
}

//Even or Odd Number
#include<iostream>

using namespace std;
bool evenodd(int n){
    if(n%2==0){
        return true;
    }else{
        return false;
    }
}
int main(){
    int num;
    cin>>num;

    if(evenodd(num)==true){
        cout<<"It is a even number";
    }else{
        cout<<"it is a Odd number";
    }
}

The video also had some homework exercises, which I plan to do tomorrow. They seem like a great way to reinforce what I've learned today.

Overall, it was a highly productive day! I'm looking forward to solving more problems and learning new concepts tomorrow.

For those interested, I share my daily DSA blog posts on Hashnode: Daily DSA Blog.

Additionally, I also share updates on my DSA journey on Twitter and LinkedIn. Here are the links if you'd like to follow along:

Twitter: Jaychav37720654 LinkedIn: Jay Chavan

Feel free to check them out.

Until next time,
Jay Chavan