C++ Exercises: Get the Excel column title that corresponds to a given column number

Last update on December 20 2024 12:24:15 (UTC/GMT +8 hours)

Write a C++ program to get the Excel column title that corresponds to a given column number (integer value).

For example:
1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB
...

Sample Solution:

C++ Code :

#include <iostream>
using namespace std;

// Function to convert a number to Excel column title
string convert_num_to_Excel_Title(int num) {
    if (num == 0) {
        return ""; // If the number is 0, return an empty string
    }

    // Recursive call to convert the number to Excel title
    return convert_num_to_Excel_Title((num - 1) / 26) + static_cast<char>((num - 1) % 26 + 'A');
}

int main(void) {
    // Test cases to convert numbers to Excel column titles
    int n = 2;
    cout << "\nColumn Number n =  " << n << " Excel column title = " << convert_num_to_Excel_Title(n) << endl; 

    n = 29;
    cout << "\nColumn Number n =  " << n << " Excel column title = " << convert_num_to_Excel_Title(n) << endl; 

    n = 153;
    cout << "\nColumn Number n =  " << n << " Excel column title = " << convert_num_to_Excel_Title(n) << endl; 

    return 0; // Return 0 to indicate successful completion
}

Sample Output:

Column Number n =  2 Excel column title = B

Column Number n =  29 Excel column title = AC

Column Number n =  153 Excel column title = EW

Flowchart:

C++ Code Editor:

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