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| Programming Assignment |
**Assignment # 5**
-------------(1)---------------
Write a C++ program that takes a positive integer as input and prints the last digit of the number using the modulus operator.
Answer:
#include <iostream>
using namespace std;
int main() {
int a;
cout << "Enter positive integer: ";
cin >> a;
if (a > 0) {
int lastDigit = a % 10;
cout << " last digit of the number is: " << lastDigit << endl;
}
else
cout << " enter positive integer." << endl;
return 0;
}
-------------------(2)----------------------
Write a C++ program that calculates the sum of digits of a positive integer using the modulus operator ( *%* ).
Input: A positive integer n (e.g., n = 12345)
Output: The sum of the digits of n (e.g., 15)
Answer:
#include <iostream>
using namespace std;
int main() {
int a;
cout << "Enter positive integer: ";
cin >> a;
if (a <= 0) {
cout << " Enter positive integer." << endl;
}
int sum = 0;
while (a > 0)
{
sum += a % 10;
a /= 10;
}
cout << " sum of the digits is: " << sum;
return 0;
}
--------------(3)-------------
Write a C++ program that initializes two variables, a and b, with values 5 and 10 respectively. Then, calculate the result of the expression (a++ + --b) and display the result. Finally, display the updated values of a and b.
Input: None
Output: The result of (a++ + --b) and the updated values of a and b.
Answer:
#include <iostream>
using namespace std;
int main() {
int a = 5, b = 10 , result ;
result = (a++ + --b);
cout << "Result of (a++ + --b): " << result << endl;
cout << "Updated value of a: " << a << endl;
cout << "Updated value of b: " << b << endl;
return 0;
}
----------------------------------------
output==>>
Result of (a++ + --b): 14
Updated value of a: 6
Updated value of b: 9
