/* Chris Davis
File name: daviscd2b.c
COMP 1200 - Fall 2006
Assignment 2
Program: Projectile's flight time and height

----------------------------------------------------------------------
This program will determine a projectile's flight duration and maximum
height given inputs of angle of elevation in degrees, velocity of the 
projectile in feet per second, and distance to the target.
----------------------------------------------------------------------
*/
#include <stdio.h>
#include <math.h>

    int main()
   {
      float degangle;
      float velocity;
      float distance;
      float time;
      float height;
      float radangle;
      float G;
      float PI;
      G = 32.17;
      PI = 3.14159;
      
      {
      
      
         printf("Enter the angle at which the projectile was launched in degrees.\n");
         scanf("%d", & degangle);
         
         if (degangle == 90)
         
            printf("Error: Denominator is equal to zero.  Please reenter data.\n");
            
             
         
            
         
         
      }
      
      {  
         printf("Enter the distance the target is away in feet.\n");
         scanf("%d", & distance);
      }
      
      {
         printf("Enter the velocity at which the projectile was launched in feet per second.\n");
         scanf("%d", & velocity);
         
         if (velocity == 0)
         {
            printf("Error: Denominator is equal to zero.  Please reenter data.\n");
            return 0;
         }
      
      }
      
      time = distance / (velocity * cos(degangle*PI/180));
   	
      height = velocity * time * sin(degangle*PI/180) - G/2 * pow(time,2);
   	
      radangle = degangle;
         
         
         
         
         
         printf("The time the projectile is in flight is %5.2f\n", time);
      printf("The maximum height in feet is %5.2f\n", height);
      printf("The Angle of Elevation in Radians is %5.2f\n", radangle);
   	 
   
   
   }