Default Arguments in C++ Functions

#include <iostream>
using namespace std;
int sum(int a, int b=10, int c=20);

int main(){
   /* In this case a value is passed as
    * 1 and b and c values are taken from
    * default arguments.
    */
   cout<<sum(1)<<endl;

   /* In this case a value is passed as
    * 1 and b value as 2, value of c values is
    * taken from default arguments.
    */
   cout<<sum(1, 2)<<endl;

   /* In this case all the three values are
    * passed during function call, hence no
    * default arguments have been used.
    */
   cout<<sum(1, 2, 3)<<endl;
   return 0;
}
int sum(int a, int b, int c){
   int z;
   z = a+b+c;
   return z;
}

sum of two values by using function

#include <iostream>
using namespace std;
/* This function adds two integer values
 * and returns the result
 */int
sum(int num1, int num2){
   int num3 = num1+num2; return num3;
}

int main(){
   //Calling the function
   cout<<sum(1,99);
   return 0;
}

EXAMPE 2:

#include <iostream>
using namespace std;
 
// function declaration
int max(int num1, int num2);
 
int main () {
   // local variable declaration:
   int a = 100;
   int b = 200;
   int ret;
 
   // calling a function to get max value.
   ret = max(a, b);
   cout << "Max value is : " << ret << endl;
 
   return 0;
}
 
// function returning the max between two numbers
int max(int num1, int num2) {
   // local variable declaration
   int result;
 
   if (num1 > num2)
      result = num1;
   else
      result = num2;
 
   return result; 
}

Recursivity function factorial of a number (n!)

Recursivity

Recursivity is the property that functions have to be called by themselves. It is useful for some tasks, such as sorting elements, or calculating the factorial of numbers. For example, in order to obtain the factorial of a number (n!) the mathematical formula would be:

n! = n * (n-1) * (n-2) * (n-3) ... * 1 
More concretely, 5! (factorial of 5) would be:

5! = 5 * 4 * 3 * 2 * 1 = 120 
And a recursive function to calculate this in C++ could be:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

// factorial calculator #include <iostream> using namespace std; long factorial (long a) { if (a > 1) return (a * factorial (a-1)); else return 1; } int main () { long number = 9; cout << number << "! = " << factorial (number); return 0; }

9! = 362880

Edit & Run

Notice how in function factorial we included a call to itself, but only if the argument passed was greater than 1, since, otherwise, the function would perform an infinite recursive loop, in which once it arrived to 0, it would continue multiplying by all the negative numbers (probably provoking a stack overflow at some point during runtime).

test mach

#include <iostream>
using namespace std;

const int Inng = 2;
const int Player = 11;

int main()
{int inngtotal=0;
    int score[Inng][Player];

    cout << "Enter all score for a Player of first Inng and then second Inng. \n";

    // Inserting the values into the score array
    for (int i = 0; i < Inng; ++i)
    {
        for(int j = 0; j < Player; ++j)
        {
            cout << "Inng " << i + 1 << ", Player " << j + 1 << " : ";
            cin >> score[i][j];
        }
    }

    cout << "\n\nDisplaying Values:\n";

    // Accessing the values from the score array
    for (int i = 0; i < Inng; ++i)
    {
        inngtotal=0;
for(int j = 0; j < Player; ++j)
        {
            cout << "Inng " << i + 1 << ", Player " << j + 1 << " = " << score[i][j] << endl;
            inngtotal=inngtotal+score[i][j];
        }
        cout << "\ninng total ="<< inngtotal;
    }

    return 0;
}

function passing value

#include <iostream>
using namespace std;
int kkk(int a,int b);
int main()
{
int i,j;
i=kkk(99,80);
cout <<"\nvalue of i .................>"<<i;




cout << "\n value of iiiiiiiiiiiiii  "<< i;

return 0;


}
int kkk(int a,int b)
{cout <<"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk\n"<<a<<"  value of b   "<<b;

return a+b;
}

while table program

#include <iostream>
using namespace std;
int main()
{
int i=1;
int t=7;
while(i<10)
{


cout<<t<<"*"<<i<<"="<<t*i<<endl;
i++;
}
return 0;

}

while 

temperature for a week of first city

#include <iostream>
using namespace std;

const int CITY = 2;
const int WEEK = 7;

int main()
{
    int temperature[CITY][WEEK];

    cout << "Enter all temperature for a week of first city and then second city. \n";

    // Inserting the values into the temperature array
    for (int i = 0; i < CITY; ++i)
    {
        for(int j = 0; j < WEEK; ++j)
        {
            cout << "City " << i + 1 << ", Day " << j + 1 << " : ";
            cin >> temperature[i][j];
        }
    }

    cout << "\n\nDisplaying Values:\n";

    // Accessing the values from the temperature array
    for (int i = 0; i < CITY; ++i)
    {
        for(int j = 0; j < WEEK; ++j)
        {
            cout << "City " << i + 1 << ", Day " << j + 1 << " = " << temperature[i][j] << endl;
        }
    }

    return 0;
}