DSA
Day 4 of DSA Daily: Exploring Switch Statements and Functions

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Day 4 of DSA Daily: Exploring Switch Statements and Functions

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JAY CHAVAN
·

2 min read

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

DSAC++