//Convert string to Title Case🌚
#include<iostream>
using namespace std;
void titleCase(char str[]) {
    int x=0;
    int prevChar=' ';
    while(str[x]!='\0') {
        if (prevChar==' ' or prevChar=='\t' or prevChar=='\n') {
            if(str[x]>='a'&& str[x]<='z')
                str[x]=str[x]-32;
        }
        else if(str[x]>='A'&& str[x]<='Z')
            str[x]=str[x]+32;

        prevChar=str[x];
        x++;
    }
}
int main() {
    char str[50];
    cout<<"Enter a string:";
    cin.getline(str,50);

    titleCase(str);
    cout<<str;
    return 0;
}

//@CPP_CODES_PRO

//To check leap year 
#include<iostream>
using namespace std;
int main() {
    int year;
    cout << "Enter a year that you want to check:";
    cin>>year;
    if((year%4==0 &&year%100!=0) ||( year%400==0))
        cout<<year<<" is a leap year"<<endl;
    else
        cout<<year<<" is not a leap year"<<endl;
    return 0;
}

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Learn how to run code in this bot.

// Print any number table

#include <iostream>

using namespace std;

int main() {
    int num;
    cout << "Enter a number: ";
    cin >> num;
    
    cout << "Table of " << num << ":" << endl;
    for(int i=1; i<=10; i++) {
        cout << num << " x " << i << " = " << num*i << endl;
    }

    return 0;
}

#include<iostream>
using namespace std;

int main() {
    int n;
    cout << "Enter Number: ";
    cin >> n;
    for(int k = 1; k <= n * 2 - 1; k++) {
        for(int l = 1; l <= n * 2 - 1; l++) {
            if(k == n || l == n || k == 1 && l >= n || k <= n && l == 1 || k >= n && l == n * 2 - 1 || k == n * 2 - 1 && l <= n)
                cout << " *";
            else
                cout << "  ";
        }
        cout << endl;
    }
    return 0;
}

#include<iostream>
using namespace std;        
int main() {
    int n;
    cout<<"Enter range:";
    cin>>n;
    for(int i=n; i>=1; i--) {
        for(int j=1; j<=i; j++) {
            cout<<j<<" ";
        }
        cout <<endl;
    }
    return 0;
}

#include<iostream>
using namespace std;
int main() {
    int n;
    cout<<"Enter range:";
    cin>>n;
    for(int i=n; i>=1; i--) {
        for(int j=i; j<=n; j++) {
            cout<<j<<" ";
        }
        cout <<endl;
    }
    return 0;
}

#include <iostream>
#include <functional>
#include <vector>

using namespace std;

class EventEmitter {
private:
    struct FuncObj {
        string mesType;
        std::function<void(int)> callback;
    };

    vector<FuncObj> funcs;

public:
    EventEmitter() {}

    void on(string mesType, std::function<void(int)> callback) {
        funcs.push_back(FuncObj{ mesType, callback });
    }

    void emit(string mesType, int obj) {
        for (auto& funobj : funcs) {
            if (funobj.mesType == mesType) {
                funobj.callback(obj);
            }
        }
    }
};

void callback(int a) {
    cout << "hi" << a;
}

int main() {
    EventEmitter e;
    e.on("message", callback);
    e.emit("message", 7);
    return 0;
}

#include <iostream>

bool isLeapYear(int year) {
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
        return true;
    } else {
        return false;
    }
}

int main() {
    int year;
    std::cout << "Enter a year: ";
    std::cin >> year;

    if (isLeapYear(year)) {
        std::cout << year << " is a leap year." << std::endl;
    } else {
        std::cout << year << " is not a leap year." << std::endl;
    }

    return 0;
}