Category: Projects

A simple game where the user guesses a number between 1 and 100.

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main() {
srand(static_cast&lt;unsigned int>(time(0)));
int number = rand() % 100 + 1; // Random number between 1 and 100
int guess;
int attempts = 0;
cout &lt;&lt; "Guess the number (between 1 and 100): ";
do {
    cin >> guess;
    attempts++;
    if (guess > number) {
        cout &lt;&lt; "Too high! Try again: ";
    } else if (guess &lt; number) {
        cout &lt;&lt; "Too low! Try again: ";
    } else {
        cout &lt;&lt; "Congratulations! You guessed it in " &lt;&lt; attempts &lt;&lt; " attempts.\n";
    }
} while (guess != number);
return 0;
}

A simple program to read and write text to a file.

cppCopy code#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main() {
ofstream outFile("example.txt");
outFile &lt;&lt; "Hello, World!\n";
outFile &lt;&lt; "This is a C++ file I/O example.\n";
outFile.close();
string line;
ifstream inFile("example.txt");
cout &lt;&lt; "Contents of the file:\n";
while (getline(inFile, line)) {
    cout &lt;&lt; line &lt;&lt; endl;
}
inFile.close();
return 0;
}

A command-line calculator that performs basic arithmetic operations.

cppCopy code#include <iostream>
using namespace std;

int main() {
char op;
float num1, num2;
cout &lt;&lt; "Enter operator (+, -, *, /): ";
cin &gt;&gt; op;
cout &lt;&lt; "Enter two numbers: ";
cin &gt;&gt; num1 &gt;&gt; num2;
switch(op) {
    case '+':
        cout &lt;&lt; num1 + num2;
        break;
    case '-':
        cout &lt;&lt; num1 - num2;
        break;
    case '*':
        cout &lt;&lt; num1 * num2;
        break;
    case '/':
        if (num2 != 0)
            cout &lt;&lt; num1 / num2;
        else
            cout &lt;&lt; "Division by zero!";
        break;
    default:
        cout &lt;&lt; "Invalid operator";
        break;
}
return 0;
}