Programme pour calculer l'aire et le périmètre d'un losange, étant donné quelles sont les diagonales ? En C++, qu'est-ce qu'un losange ?

Input-: d1=6 and d2=12
Output-: The perimeter of rhombus with given diagonals are :26
   The area of rhombus with given diagonals are :36

Start
Step 1 -> declare function to calculate perimeter of rhombus
   int perimeter(int d1, int d2)
      Declare variable long long int perimeter
      Set perimeter = 2 * sqrt(pow(d1, 2) + pow(d2, 2))
      Print perimeter
Step 2 -> Declare function to calculate area of rhombus
   int area(int d1, int d2)
      Declare long long int area
      Set area = (d1 * d2) / 2
      Print area
Step 3 -> In main()
   Declare variable int d1 = 6, d2 = 12
   Call perimeter(d1, d2)
   Call area(d1, d2)
Stop

#include <iostream>
#include <math.h>
using namespace std;
// program to calculate perimeter of rhombus
int perimeter(int d1, int d2){
   long long int perimeter;
   perimeter = 2 * sqrt(pow(d1, 2) + pow(d2, 2));
   cout<< "The perimeter of rhombus with given diagonals are :"<<perimeter;
}
//program to calculate area of rhombus
int area(int d1, int d2){
   long long int area;
   area = (d1 * d2) / 2;
   cout<<"</p><p>The area of rhombus with given diagonals are :"<< area;
}
int main(){
   int d1 = 6, d2 = 12;
   perimeter(d1, d2);
   area(d1, d2);
   return 0;
}

The perimeter of rhombus with given diagonals are :26
The area of rhombus with given diagonals are :36