Given string str which represents a number with separators(, ) in the International number system, the task is to convert this string representation into the Indian Numeric System.
Examples:
Input: str = “123, 456, 789”
Output: 12, 34, 56, 789
Explanation:
The given string represents a number in the international system. It is converted to the Indian system.
Input: str = “90, 050, 000, 000”
Output: 90, 05, 00, 00, 000
International Numeric System: The International numbering system is used outside the Indian subcontinent to express large numbers. It follows the following schema:Number Applying separators In words 1 1 One 10 10 Ten 100 100 One hundred 1000 1, 000 One thousand 10000 10, 000 Ten thousand 100000 100, 000 One hundred thousand 1000000 1, 000, 000 One million 10000000 10, 000, 000 Ten million 100000000 100, 000, 000 One hundred million 1000000000 1, 000, 000, 000 One billion
Indian Numeric System: The Indian numbering system is used in the Indian subcontinent to express large numbers. It follows the following schema:Number Applying separators In words 1 1 One 10 10 Ten 100 100 One hundred 1000 1, 000 One thousand 10000 10, 000 Ten thousand 100000 1, 00, 000 One lakh 1000000 10, 00, 000 Ten lakh 10000000 1, 00, 00, 000 One crore 100000000 10, 00, 00, 000 Ten crore 1000000000 100, 00, 00, 000 One hundred crore
Approach: From the above representations, the idea is to first obtain the number without any separators. Therefore:
- Remove all the separators(, ) from the string.
- Reverse the string.
- Process the string and put a separator(, ) after the third number.
- Now put a separator(, ) after every second number. This converts the number into the Indian Numeric System.
- Reverse the string again and print it.
Below is the implementation of the above approach:
C++
// C++ program to convert the number// from International system// to Indian system#include <bits/stdc++.h>using namespace std;// Function to convert a number represented// in International numeric system to// Indian numeric system.string convert(string input){ // Find the length of the // input string int len = input.length(); // Removing all the separators(, ) // from the input string for (int i = 0; i < len;) { if (input[i] == ', ') { input.erase(input.begin() + i); len--; i--; } else if (input[i] == ' ') { input.erase(input.begin() + i); len--; i--; } else { i++; } } // Reverse the input string reverse(input.begin(), input.end()); // Declaring the output string string output; // Process the input string for (int i = 0; i < len; i++) { // Add a separator(, ) after the // third number if (i == 2) { output += input[i]; output += ", "; } // Then add a separator(, ) after // every second number else if (i > 2 && i % 2 == 0 && i + 1 < len) { output += input[i]; output += ", "; } else { output += input[i]; } } // Reverse the output string reverse(output.begin(), output.end()); // Return the output string back // to the main function return output;}// Driver codeint main(){ string input1 = "123, 456, 789"; string input2 = "90, 050, 000, 000"; cout << convert(input1) << endl; cout << convert(input2);} |
Java
// Java program to convert the number// from International system// to Indian systemimport java.util.*;class GFG{// Function to convert a number represented// in International numeric system to// Indian numeric system.static String convert(String input){ StringBuilder sbInput = new StringBuilder(input); // Find the length of the // sbInput int len = sbInput.length(); // Removing all the separators(, ) // from the sbInput for (int i = 0; i < len;) { if (sbInput.charAt(i) == ',') { sbInput.deleteCharAt(i); len--; i--; } else if (sbInput.charAt(i) == ' ') { sbInput.deleteCharAt(i); len--; i--; } else { i++; } } // Reverse the sbInput StringBuilder sbInputReverse = sbInput.reverse(); // Declaring the output StringBuilder output = new StringBuilder(); // Process the sbInput for (int i = 0; i < len; i++) { // Add a separator(, ) after the // third number if (i == 2) { output.append(sbInputReverse.charAt(i)); output.append(" ,"); } // Then add a separator(, ) after // every second number else if (i > 2 && i % 2 == 0 && i + 1 < len) { output.append(sbInputReverse.charAt(i)); output.append(" ,"); } else { output.append(sbInputReverse.charAt(i)); } } // Reverse the output StringBuilder reverseOutput = output.reverse(); // Return the output string back // to the main function return reverseOutput.toString();}// Driver codepublic static void main(String[] args){ String input1 = "123, 456, 789"; String input2 = "90, 050, 000, 000"; System.out.println(convert(input1)); System.out.println(convert(input2));}}// This code is contributed by offbeat |
Python3
# Python3 program to convert# the number from International# system to Indian system# Function to convert a number# represented in International# numeric system to Indian numeric# system.def convert(input): # Find the length of the # input string Len = len(input) # Removing all the separators(, ) # from the input string i = 0 while(i < Len): if(input[i] == ","): input = input[:i] + input[i + 1:] Len -= 1 i -= 1 elif(input[i] == " "): input=input[:i] + input[i + 1:] Len -= 1 i -= 1 else: i += 1 # Reverse the input string input=input[::-1] # Declaring the output string output = "" # Process the input string for i in range(Len): # Add a separator(, ) after the # third number if(i == 2): output += input[i] output += " ," # Then add a separator(, ) after # every second number elif(i > 2 and i % 2 == 0 and i + 1 < Len): output += input[i] output += " ," else: output += input[i] # Reverse the output string output=output[::-1] # Return the output string back # to the main function return output# Driver codeinput1 = "123, 456, 789"input2 = "90, 050, 000, 000"print(convert(input1))print(convert(input2))# This code is contributed by avanitrachhadiya2155 |
12, 34, 56, 789 90, 05, 00, 00, 000
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