Programming

#include<stdio.h>


void menu (int* choice);
void ac (int choice, FILE* plane,int input[], int* MAX_WEIGHT, int* MAX_CG, int arm[]);
void getdata (FILE* plane, int input []);
int calc (int MAX_WEIGHT, int MAX_CG,int input[], int arm[], int* weight, int* balance);
void print( int weight, int balance, int oepration);

int main (void)
{

 
  int choice;
  FILE* plane;
  int input [15] = {0};
  int arm [6] = {0};
  int weight, balance = 0;

  int MAX_WEIGHT, MAX_CG;//upper limits of the weight and CG per plane
  int operation;

  menu(&choice);
  
  ac(choice, plane, input, &MAX_WEIGHT, &MAX_CG, arm);  // ac or a/c is short for Aircraft. Easier separation between function and file called plane
/*  plane = fopen("C172.DAT", "r");
  input[0] = 1491;
  MAX_WEIGHT = 2550;
  MAX_CG = 47;
*/

  getdata(plane, input);
  operation = calc (MAX_WEIGHT, MAX_CG,input, arm, &weight, &balance); // return value of '1' will be inside limits, '0' will be outside limits
  print(weight, balance, operation);

  return 0;

}


//=================================menu function================================


void menu (int* choice)
{
  printf("****************WELCOME!****************");
  printf("\n");
  printf("This program enabels you to calculate\n");
  printf("your weight and balance. Please enter\n");
  printf("a number and key <retrun> to make your\n");
  printf("selection from the menu below:\n");
  printf("\n");
  printf("1| Cessna 172\n");
  printf("2| Cherokee 6\n");
  printf("3| Piper Cub\n\n\n");
  printf("Enter your choice:");
  scanf("%d", choice);

 

 return;
}


//=====================================select data=========================

void ac (int choice, FILE* plane, int input[], int* MAX_WEIGHT, int* MAX_CG, int arm[])
{
  
 switch (choice)
     {
    case 1: plane =  fopen("C172.DAT", "r");
        input[0] = 1491;
        *MAX_WEIGHT = 2550;
        *MAX_CG = 47;
          arm[0] = 39;
          arm[1] = 35;
          arm[2] = 35;
          arm[3] = 74;
          arm[4] = 97;
          arm[5] = 116;
        break;
    case 2: plane =  fopen("Piper6.DAT", "r");
        input[0] = 1980 ;
            *MAX_WEIGHT = 3674 ;
        *MAX_CG = 96;
        arm[0] = 85;
        arm[1] = 85;
        arm[2] = 95;
        arm[3] = 118;
        arm[4] = 156;
        arm[5] = 179;

         
        break;
    case 3: plane =  fopen("Cub.DAT", "r");
        input[0] = 765.7;
        *MAX_WEIGHT = 1200;
        *MAX_CG = 23.7;
         arm[0] = 17;
         arm[1] = 9;
         arm[2] = 36;
         arm[3] = -18;
         arm[4] =  49;
        break;
      }
  
return;

}
//============================================getting data===============


void getdata (FILE* plane, int input[])
{
  char charin;
  int i = 1;

  while( (charin = fgetc(plane)) != EOF)
  {
   printf("%c", charin);
   while( (charin = fgetc(plane)) != '\n'  )
   {
     printf("%c", charin);
   }
    scanf("%d", &input[i]);
    i++;
  }
 

  return;
}



//===================calc data=========================


int calc (int MAX_WEIGHT, int MAX_CG, int input[], int arm[],  int* weight, int* balance)
{
  int moment;
  *weight = 0;

  for(int i = 0; i <=5; i++)
  {
    *weight += input[i] ;
    *balance += (input[i] * arm [i]); // one easy way to calculate the moment of inertia is to multiply the wieght by the arm and add it all up
  
  }//for

  printf("%d, %d", *weight , * balance);

  if ( (*weight > MAX_WEIGHT) || ((*balance / *weight) > MAX_CG) )
   return 0;
  else
    return 1;

}
//=========================print data======================


void print( int weight, int balance, int operation)
{

  if (operation == 0)
  {printf("\nI'm sorry, but your plane is not withing the flight envelope.");
   printf("\nPlease make adjustments so it is within proper weight and balance.\n");
  }
   else
   {
     printf("\n\nYour total weight is: %d\n", weight);
     printf("Your CG is: %d\n", (balance / weight ) );
   }

   return;
}//print results
]0;flyboy@csc-linux1:~[flyboy@csc-linux1 ~]$ gcc std-std=c99 term.c
]0;flyboy@csc-linux1:~[flyboy@csc-linux1 ~]$ a.out
****************WELCOME!****************
This program enabels you to calculate
your weight and balance. Please enter
a number and key <retrun> to make your
selection from the menu below:

1| Cessna 172
2| Cherokee 6
3| Piper Cub


Enter your choice:1
1
1
1
1
^C
]0;flyboy@csc-linux1:~[flyboy@csc-linux1 ~]$ exit
exit

Script done on Thu 30 Apr 2009 11:08:53 PM CDT

void ac (int choice, FILE** plane,int input[], int* MAX_WEIGHT, int* MAX_CG, int arm[]);