From 21e0807452a1f86c6dc9f8bb821bd26e02eb8cb0 Mon Sep 17 00:00:00 2001
From: Kelash <58991510+KumarKelashMeghwar@users.noreply.github.com>
Date: Sat, 23 Oct 2021 14:12:36 +0500
Subject: [PATCH 1/2] Adding some cpp programs

---
 matrix calculator.cpp | 128 ++++++++++++++++++++++++++++++++++++++++++
 time conversion.cpp   |  14 +++++
 2 files changed, 142 insertions(+)
 create mode 100644 matrix calculator.cpp
 create mode 100644 time conversion.cpp

diff --git a/matrix calculator.cpp b/matrix calculator.cpp
new file mode 100644
index 0000000..a6a8139
--- /dev/null
+++ b/matrix calculator.cpp	
@@ -0,0 +1,128 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+
+void setmatrix(int array[3][3])
+    {
+        cout<<"Enter Values:\n";
+           for(int i=0;i<3;i++)
+  	      { 
+    	       for(int j=0;j<3;j++) 
+		         {
+	 			    cout<<"("<<i<<","<<j<<")= ";
+	  			    cin>>array[i][j];
+    	          }
+  	       }
+	}
+
+void showmatrix(int array[3][3])
+		{ 
+		 for(int i=0;i<3;i++)
+ 		   {
+   			  for(int j=0;j<3;j++)
+     			 {cout<<array[i][j]<<" ";} 
+     		  cout<<endl;
+ 		   }
+		}
+
+void matrixaddition(int array1[3][3],int array2[3][3])
+ 	 {   
+ 	    int tempvariable;
+ 	    
+      for(int i=0;i<3;i++)
+   		{
+     	 for(int j=0;j<3;j++)
+	   		{
+	      tempvariable=array1[i][j]+array2[i][j];
+   			cout<<tempvariable<<" ";
+       		 }
+         cout<<endl;
+    	}
+  	 }
+void matrixmultiplication(int array1[3][3],int array2[3][3])
+ 	{   
+	  int tempvariable;
+    	for(int i=0;i<3;i++)
+    	{ 
+    	  for(int j=0;j<3;j++) 
+    		{   int sum=0;
+		     	for(int k=0;k<3;k++)
+		  	 {
+    			sum+=array1[i][k]*array2[k][j]; 
+		  	 }
+	       	 tempvariable=sum; 
+	         cout<<tempvariable<<" ";	
+     		}  
+		   cout<<endl;
+		}
+    }
+    
+void matrixsubtraction(int array1[3][3],int array2[3][3])
+ 		{
+ 			int tempvariable;
+			for(int i=0;i<3;i++)
+   		  {
+           	  for(int j=0;j<3;j++)
+	      		{
+	      		tempvariable=array1[i][j]-array1[i][j];
+           		 cout<<tempvariable<<" ";
+          		}
+            cout<<endl;
+    	  }
+		}
+
+void matrixdivision(int array1[3][3],int array2[3][3])
+    {
+    	cout<<"\nCant perform Division in matrices\n";
+    	
+    }  	 
+int main()
+{
+	char c,doagain=' ';
+     int A[3][3], B[3][3];          //Two matrices
+     
+    cout<<"Enter first matrix: \n";
+	 setmatrix(A);
+     
+    cout<<"\nEnter 2nd matrix: \n";
+     setmatrix(B);
+     
+    cout<<"The two matrices are: \n";
+    showmatrix(A);
+    
+    cout<<endl<<endl;
+    showmatrix(B);
+     
+     while(doagain!='n') 
+     {
+	 
+	  cout<<"\nWhich operation do you want to perform(+,-,*,/)? : ";
+      cin>>c;
+   switch(c)
+   {
+   	case '*':
+   		matrixmultiplication(A,B);
+   		break;
+   		
+   	case '+':
+   		matrixaddition(A,B);
+   		break;
+   		
+   	case '-':
+   		matrixsubtraction(A,B);
+   		break;
+   		
+   	case '/':
+   		matrixdivision(A,B);
+   		break;
+   		
+   	default:
+   		cout<<"Invalid operator!!!";
+   		
+   }
+    cout<<"\nDo u want to perform another operation again(y/n)? :";
+     cin>>doagain;
+     }
+   
+   
+}
diff --git a/time conversion.cpp b/time conversion.cpp
new file mode 100644
index 0000000..ef88c94
--- /dev/null
+++ b/time conversion.cpp	
@@ -0,0 +1,14 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+int main()
+{ int hours,secs,mins;
+cout<<"Enter no of hours= ";
+cin>>hours;
+mins=hours*60;
+cout<<"Mins in given hours= "<<mins<<endl;
+secs=mins*60;
+cout<<"Seconds in given hours= "<<secs<<endl;
+
+getch();
+}

From edd02d2e249fe6c14b7f61f0657c39ed5c930158 Mon Sep 17 00:00:00 2001
From: Kelash <58991510+KumarKelashMeghwar@users.noreply.github.com>
Date: Sat, 23 Oct 2021 14:19:51 +0500
Subject: [PATCH 2/2] close #488 currency converter in python added

---
 currency-converter-project.py | 91 +++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 currency-converter-project.py

diff --git a/currency-converter-project.py b/currency-converter-project.py
new file mode 100644
index 0000000..b932834
--- /dev/null
+++ b/currency-converter-project.py
@@ -0,0 +1,91 @@
+# # Python Project on Currency Converter
+
+import requests
+from tkinter import *
+import tkinter as tk
+from tkinter import ttk
+
+
+class RealTimeCurrencyConverter():
+    def __init__(self,url):
+            self.data = requests.get(url).json()
+            self.currencies = self.data['rates']
+
+    def convert(self, from_currency, to_currency, amount): 
+        initial_amount = amount 
+        if from_currency != 'USD' : 
+            amount = amount / self.currencies[from_currency] 
+  
+        # limiting the precision to 4 decimal places 
+        amount = round(amount * self.currencies[to_currency], 4) 
+        return amount
+
+class App(tk.Tk):
+
+    def __init__(self, converter):
+        tk.Tk.__init__(self)
+        self.title = 'Currency Converter'
+        self.currency_converter = converter
+
+        #self.configure(background = 'blue')
+        self.geometry("500x200")
+        
+        # Label
+        self.intro_label = Label(self, text = 'Welcome to Real Time Currency Convertor',  fg = 'blue', relief = tk.RAISED, borderwidth = 3)
+        self.intro_label.config(font = ('Courier',15,'bold'))
+
+        self.date_label = Label(self, text = f"1 Indian Rupee equals = {self.currency_converter.convert('INR','USD',1)} USD \n Date : {self.currency_converter.data['date']}", relief = tk.GROOVE, borderwidth = 5)
+
+        self.intro_label.place(x = 10 , y = 5)
+        self.date_label.place(x = 160, y= 50)
+
+        # Entry box
+        valid = (self.register(self.restrictNumberOnly), '%d', '%P')
+        self.amount_field = Entry(self,bd = 3, relief = tk.RIDGE, justify = tk.CENTER,validate='key', validatecommand=valid)
+        self.converted_amount_field_label = Label(self, text = '', fg = 'black', bg = 'white', relief = tk.RIDGE, justify = tk.CENTER, width = 17, borderwidth = 3)
+
+        # dropdown
+        self.from_currency_variable = StringVar(self)
+        self.from_currency_variable.set("INR") # default value
+        self.to_currency_variable = StringVar(self)
+        self.to_currency_variable.set("USD") # default value
+
+        font = ("Courier", 12, "bold")
+        self.option_add('*TCombobox*Listbox.font', font)
+        self.from_currency_dropdown = ttk.Combobox(self, textvariable=self.from_currency_variable,values=list(self.currency_converter.currencies.keys()), font = font, state = 'readonly', width = 12, justify = tk.CENTER)
+        self.to_currency_dropdown = ttk.Combobox(self, textvariable=self.to_currency_variable,values=list(self.currency_converter.currencies.keys()), font = font, state = 'readonly', width = 12, justify = tk.CENTER)
+
+        # placing
+        self.from_currency_dropdown.place(x = 30, y= 120)
+        self.amount_field.place(x = 36, y = 150)
+        self.to_currency_dropdown.place(x = 340, y= 120)
+        #self.converted_amount_field.place(x = 346, y = 150)
+        self.converted_amount_field_label.place(x = 346, y = 150)
+        
+        # Convert button
+        self.convert_button = Button(self, text = "Convert", fg = "black", command = self.perform) 
+        self.convert_button.config(font=('Courier', 10, 'bold'))
+        self.convert_button.place(x = 225, y = 135)
+
+    def perform(self):
+        amount = float(self.amount_field.get())
+        from_curr = self.from_currency_variable.get()
+        to_curr = self.to_currency_variable.get()
+
+        converted_amount = self.currency_converter.convert(from_curr,to_curr,amount)
+        converted_amount = round(converted_amount, 2)
+
+        self.converted_amount_field_label.config(text = str(converted_amount))
+    
+    def restrictNumberOnly(self, action, string):
+        regex = re.compile(r"[0-9,]*?(\.)?[0-9,]*$")
+        result = regex.match(string)
+        return (string == "" or (string.count('.') <= 1 and result is not None))
+
+if __name__ == '__main__':
+    url = 'https://api.exchangerate-api.com/v4/latest/USD'
+    converter = RealTimeCurrencyConverter(url)
+
+    App(converter)
+    mainloop()
+