Homework Number 5

#include <stdio.h>

#include <math.h>

/* This program will convert Feet/sec to Miles/Hour, and print a chart with increments of 5 */

int main(void) {

float mph = 0;

int i = 0, x;

char again = 'y';

while (again == 'y'){

 printf("Feet/sec  Miles/hour \n");

 x = i;

 for (i; i<(105+x); i = i+ 5)

 {

  mph = 0.6818*i;

  printf( "%6i %12.5f \n", i, mph); }

 printf("Another 10 steps? (y/n)");

 scanf(" %s", &again);

}

return 0;

}

WAVES CODE

#include <stdio.h>

#include <math.h>

#define PI 3.14159265358979323846

int main(void) {

float w1_p, w1_h, w1_wl, w2_p, w2_h, w2_wl, num_points, time_increment, w1_f, w2_f, phase;

char more = 'y', input_method;

while (more == 'y') {

printf("Input: (f)/s or (m)/s");

scanf(" %c", &input_method);

printf("Enter integer wave period (s) and wave height(%c) \n", input_method );

scanf(" %f %f", &w1_p, &w1_h);

printf("Enter integer wave period for wave2 (s), and wave height for wave2 (%c) \n", input_method);

scanf(" %f %f", &w2_p, &w2_h);

w1_wl = 5.13*(w1_p*w1_p);

w2_wl = 5.13*(w2_p*w2_p);

printf("Wavelength of wave 1: %.2f \n", w1_wl);

printf("Wavelength of wave 2: %.2f \n", w2_wl);

if (input_method == 'm'){

w1_h =3.28*w1_h;

w2_h = 3.28*w2_h;

}

printf("Number of data points to compute?");

scanf(" %f", &num_points);

time_increment = (w1_p*w2_p)/num_points;

float t = 0;

float steps = 0;

float sum = 0;

float highest = 0;

printf("Phase shift for wave 2? (in radians): ");

scanf(" %f", &phase );

w1_f = 1/(w1_p);

w2_f = 1/(w2_p);

/* These lines will compute and print the combined max height over given interval */

while (steps <= num_points){

sum = w1_h*(sin(2*PI*w1_f*t)) + w2_h*(sin(2*PI*w2_f*t + phase));

if (sum >= highest){

highest = sum;

}

t = t+ time_increment;

steps = steps+1;

}

printf("Maximum combined wave height (feet): %2.3f \n", highest);

printf (" Max crest and min trough: % 3.2f \n", highest/2);

/* These lines will compute and print the height at given times */

float num_boi, step_boi = 0, time_boi = 0, height_boi;

printf("Number of times you want to find specific height:");

scanf(" %f", &num_boi);

while (step_boi < num_boi ){

printf("Specific time to find maximum height for?");

scanf(" %f", &time_boi);

height_boi = w1_h*(sin(2*PI*w1_f*time_boi)) + w2_h*(sin(2*PI*w2_f*time_boi + phase));

printf("The height at %2.3f seconds is %2.3f feet \n", time_boi, height_boi );

step_boi = step_boi +1 ;

}

printf("Run program again? (y/n)");

scanf(" %c", &more);

}

return 0;

}