#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<ctype.h>
#include<string.h>
#include<math.h>
#define pi 3.1428571
float calculating_circle_surround()
{
float redius,surround;
printf("To get the surround value please enter the redius value : ");
scanf("%f",&redius);
surround=2*pi*redius;
printf("The surround is : %f",surround);
return(surround);
}
float calculating_circle_area()
{
float redius,area;
printf("

To get the area value please enter the redius value : ");
scanf("%f",&redius);
area=(redius*redius)*pi;
printf("The area is : %f

",area);
return(area);
}
float calculating_square_surround()
{
float edge,surround;
printf("

To get the surround value please enter the edge value : ");
scanf("%f",&edge);
surround=4*edge;
printf("The surround is : %f

",surround);
return(surround);
}
float calculating_square_area()
{
float edge,area;
printf("

To get the area value please enter the edge value : ");
scanf("%f",&edge);
area=edge*edge;
printf("The area is : %f

",area);
return(area);
}
float calculating_quad_surround()
{
float edge1,edge2,surround;
printf("

To get the surround value please enter the edge1 value : 
");
scanf("%f",&edge1);
printf("

To get the surround value please enter the edge2 value : 
");
scanf("%f",&edge2);
surround=2*(edge1+edge2);
printf("The area is : %f

",surround);
return(surround);
}
float calculating_quad_area()
{
float edge1,edge2,area;
printf("

To get the area value please enter the edge1 value : ");
scanf("%f",&edge1);
printf("

To get the area value please enter the edge2 value : ");
scanf("%f",&edge2);
area=edge1*edge2;
printf("The area is : %f

",area);
return(area);
}
float calculating_triangle_surround()
{
float edge1,edge2,edge3,surround;
printf("

To get the surround value please enter the edge1 value : 
");
scanf("%f",&edge1);
printf("

To get the surround value please enter the edge2 value : 
");
scanf("%f",&edge2);
printf("

To get the surround value please enter the edge3 value : 
");
scanf("%f",&edge3);
surround=edge1+edge2+edge3;
printf("The area is : %f

",surround);
return(surround);
}
float calculating_triangle_area()
{
float edge1,edge2,angle,area;
printf("

To get the area value please enter the edge1 value : ");
scanf("%f",&edge1);
printf("

To get the area value please enter the edge2 value : ");
scanf("%f",&edge2);
printf("

To get the area value please enter the angle value : ");
scanf("%f",&angle);
angle=(angle*pi)/180;
area=.5*edge1*edge2*(sin(angle));
printf("The area is : %f

",area);
return(area);
}
main()
{
first:
char a,b,c;
printf("Please select the operation:-
");
printf("----------------------------

");
printf("(C)ircle calculations
");
printf("(S)quare calculations
");
printf("(Q)uadeangles calculations
");
printf("(T)riangles calculations
");
printf("(E)xit


:

");
a=getch();
if(a=='c')
{
back_to_c:
clrscr();
printf("Select an operation:-
");
printf("--------------------

");
printf("(S)urround of the circle
");
printf("(A)rea of the circle
");
printf("(B)ack


:
");
b=getch();
if(b=='s'){clrscr();
calculating_circle_surround();
do_anther_op_cs:
printf("
anther circle surround operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_circle_surround();goto do_anther_op_cs;getch();};
if(c=='n'){goto back_to_c;};
exit(0);
}
if(b=='a'){clrscr();
calculating_circle_area();
do_anther_op_ca:
printf("
anther circle area operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_circle_area();goto do_anther_op_ca;getch();};
if(c=='n'){goto back_to_c;};
exit(0);
}
if(b=='b'){clrscr();
goto first;}
}
if(a=='s')
{
back_to_s:
clrscr();
printf("Select an operation:-
");
printf("--------------------

");
printf("(S)urround of the square
");
printf("(A)rea of the square
");
printf("(B)ack


:
");
b=getch();
if(b=='s'){clrscr();
calculating_square_surround();
do_anther_op_ss:
printf("
anther square surround operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_square_surround();goto do_anther_op_ss;getch();};
if(c=='n'){goto back_to_s;};
exit(0);
}
if(b=='a'){clrscr();
calculating_square_area();
do_anther_op_sa:
printf("
anther square area operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_square_area();goto do_anther_op_sa;getch();};
if(c=='n'){goto back_to_s;};
exit(0);
}
if(b=='b'){clrscr();
goto first;}
}
if(a=='q')
{
back_to_q:
clrscr();
printf("Select an operation:-
");
printf("--------------------

");
printf("(S)urround of the quadangles
");
printf("(A)rea of the quadangles
");
printf("(B)ack


:
");
b=getch();
if(b=='s'){clrscr();
calculating_quad_surround();
do_anther_op_qs:
printf("
anther quadangles surround operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_quad_surround();goto do_anther_op_ss;getch();};
if(c=='n'){goto back_to_q;};
exit(0);
}
if(b=='a'){clrscr();
calculating_quad_area();
do_anther_op_qa:
printf("
anther quadangles area operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_quad_area();goto do_anther_op_qa;getch();};
if(c=='n'){goto back_to_q;};
exit(0);
}
if(b=='b'){clrscr();
goto first;}
}
if(a=='t')
{
back_to_t:
clrscr();
printf("Select an operation:-
");
printf("--------------------

");
printf("(S)urround of the triangles
");
printf("(A)rea of the triangles
");
printf("(B)ack


:
");
b=getch();
if(b=='s'){clrscr();
calculating_triangle_surround();
do_anther_op_ts:
printf("
anther triangles surround operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_triangle_surround();goto do_anther_op_ts;getch();};
if(c=='n'){goto back_to_t;};
exit(0);
}
if(b=='a'){clrscr();
calculating_triangle_area();
do_anther_op_ta:
printf("
anther triangles area operation?(Y/N)
");
c=getch();
if(c=='y'){clrscr();
calculating_triangle_area();goto do_anther_op_ta;getch();};
if(c=='n'){goto back_to_t;};
exit(0);
}
if(b=='b'){clrscr();
goto first;}
}
if(a=='e'){clrscr();
printf("Thank you for using our software...


");
printf("Engineer/Muhammad Saeed Badawy


");
printf("        
war_device@hotmail.com");}
getch();
}