Write the following program in c++ to print:
q1. the following pattern on the screen
@
@@
@@@

q2. to accept a name from the user and print it with a message.
q3. write a c++ program to accept percentage from the user and display it with a congratulations message. eg: congratulations you have scored xy% in the exam.
q4. write a program to accept a number from the user and identify whether the given number is odd or even.
q5. write a program to accept the radius of a circle from the user and display the area of circumference of the circle.
syntax:
area of circle= pi*radius*radius*
circumference= 2*pi*radius

1.
#include <iostream>#include <string>
using namespace std;
int main(){    string chars; // This is where we will put our @ signs and print them    for(int x=0;x < 5; x++){
        chars = chars + '@'; // This will concatenate an @ sign at the end of the variable        cout << chars << "\n";    }}

2.
#include <iostream>#include <string>
using namespace std;
int main(){    string name; // Our variable to store the name    cout << "What is your name? \n"; // Asks the user for their name    cin >> name;    cout << "\nWell, hello " << name << "!";}

3.
#include <iostream>#include <string>
using namespace std;
int main(){    int number; // Our variable    cout << "Enter a number\n"; // Asks for a number    cin >> number;    cout << "You entered " << number << "%!";}

4.
#include <iostream>#include <string>
using namespace std;
int main(){    int number; // Our variable    cout << "Enter a number\n";    cin >> number;
    int check = number % 2; // The modulo operator (the percent sign) gets the remainder of the quotient    if (check == 0) {        cout << number << " is even!"; // If the remainder is 0 then it prints out "x is even"    } else {        cout << number << " is odd!"; // If the remainder is not 0 then it prints out "x is odd"    }}

5.
#include <iostream>#include <string>
using namespace std;
int main(){    float r; // Our variable    cout << "Enter a radius\n";    cin >> r;    if (r < 0){        cout << "Lol. No."; // If the radius is less than zero print out that message    }    float circumference=2*3.14*r;    float area=r*r*3.14;    cout << "\n\n Circumference of circle: " << circumference;    cout << "\n Area of circle: " << area;}

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