01  #include <stdio.h>
02  #include <math.h>
03  
04  int main()
05  {
06   int d1,d2;
07   float area;
08  
09   printf("Enter the values of diagonals (D1 and D2) : n");
10   scanf("%d %d", &d1, &d2);
11  
12   area = (d1*d2)/2;
13  
14   printf("Area of the Rhombus = %.2f n", area);
15   return 0;
16   }

 OUTPUT :
 
 Enter the values of diagonals (D1 and D2) :
 
 10
 20
 
 Area of the Rhombus = 100.00