# Running Sum of Numbers Using Ordinal Indicators in C++

May 26, 2020

I wrote this simple program to demonstrate how to write a running sum of number using ordinal numbers in C++ programming language.
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``````Program Listing
// ordinal.cpp
// May 26, 2020      Tuesday    10:51 PM

#include <iostream>
#include <string>

using namespace std;

string ordinal(int i)
{

int mod100 = 0, mod10 = 0;

mod100 = (i % 100);
mod10 = (i % 10);

if (mod10 == 1 && mod100 != 11) {
return "st";
} else if (mod10 == 2 && mod100 != 12) {
return "nd";
}
else if (mod10 == 3 && mod100 != 13) {
return "rd";
} else {
return "th";
}
}

int main()
{

int num_items = 0, sum = 0, num;

cout <<"\n\n";
cout <<"\tRunning Sum of Numbers Using Ordinal Indicators in C++";
cout <<"\n\n";
cout << "\tHow many items: ";
cin >> num_items;
for (int i = 1; i <= num_items; ++i)
{
cout << "\tGive value in the " << i << ordinal(i) << " item: ";
cin >> num;
sum += num;
cout << "\tThe running sum is: " << sum << '\n';
}
cout <<"\n";
cout <<"\tEnd of the Program";
cout <<"\n";
}``````