Day 3 Mods and HW

#1 SALINITY
/*–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/*  This program uses linear interpolation to                  */
/*  compute the freezing temperature of seawater.              */
#include <stdio.h>
#include <math.h>
int main(void)
{
/*  Declare variables.  */
double a, f_a, b, f_b, c, f_c;
/*  Get user input from the keyboard.  */
printf("Use ppt for salinity values. \n");
printf("Use degrees F for temperatures. \n");

printf("Enter first salinity and freezing temperature: \n");
scanf("%lf %lf",&a,&f_a);

printf("Enter second salinity and freezing temperature: \n");
scanf("%lf %lf",&c,&f_c);

printf("Enter new salinity: \n");
scanf("%lf",&b);
//  Use linear interpolation to compute   new freezing temperature.          
f_b = f_a + (b-a)/(c-a)*(f_c - f_a);

/*  Print new freezing temperature.  */
printf("New freezing temperature in degrees F: %4.1f \n",f_b);

printf("New freezing temperature in degrees C: %4.1f \n",(f_b - 32)*5/9);

printf("Enter a freezing temp in degrees F: \n");
scanf("%lf",&b);

f_b = ((b-f_a)*(c-a)/(f_c - f_a)) + a;

printf("The salinity in ppt is: %4.1f \n",f_b);

return 0;  /*  Exit program.  */
}

//MOD 3 No the program would not need to be changed the calculations would all just be done in degrees C

#2 PLANES
/*----------------------------------------------------------------------*/
/* Garrett Giordano - Luke Colias */
/* PlaneSpeed */
/* Calculates Plane velocity and acceleration based on time
/*----------------------------------------------------------------------*/

#include <stdio.h>
#include <math.h>

double CalcVel(double);
double CalcAccel(double);

int main(void)
{
/*  Declare variables.  */
double time, velocity, acceleration;

/*  Get user input from the keyboard.  */
printf("Input Time in Seconds:");
scanf("%lf",&time);

//  Use linear interpolation to compute   new freezing temperature.          
velocity = CalcVel(time);

acceleration = CalcAccel(velocity);

/*  Print new freezing temperature.  */
printf("Velocity: %4.2f \n",velocity);
printf("Acceleration: %4.2f \n", acceleration);

printf("Velocity(ft/s): %4.2f \n",velocity*39.37/12);
printf("Acceleration(ft/s): %4.2f \n", acceleration*39.37/12);

printf("Input Time in Minutes:");
scanf("%lf",&time);
time *= 60;

velocity = CalcVel(time);

acceleration = CalcAccel(velocity);

/*  Print new freezing temperature.  */
printf("Velocity: %4.2f \n",velocity);
printf("Acceleration: %4.2f \n", acceleration);

printf("Velocity(ft/s): %4.2f \n",velocity*39.37/12);
printf("Acceleration(ft/s): %4.2f \n", acceleration*39.37/12);

return 0;  /*  Exit program.  */

}

double CalcVel(double time)
{

return .00001 * pow(time,3) - .00488*pow(time,2) + .75795 * time + 181.3566 ;
}

double CalcAccel(double vel)
{
return 3-.000062 * pow(vel,2);
}