Help with c homework please

Question

http://www.cs.ucf.edu/courses/cop3223/spr2021/section2/cop3223sp21ass1.pdf

I need help with coding Problem A, B, and C

B and C are if-then-else statements/constructs

Answer 1

#include <stdio.h>

#define TAX_RATE (0.065)

int main()

{

float price;

printf(" What is the cost of the item to be purchased (in dollars )??? :> ");

scanf("%f",&price);

int n;

printf(" How many of the item are you purchasing ? :>");

scanf("%d",&n);

int tax_flag;

printf(" Is the item a taxed item (1 = yes 0 = no) ? :>");

scanf("%d",&tax_flag);

double total_cost = price*n *(1+tax_flag*TAX_RATE);

printf(" The total purchase will cost $ %6.2lf \n",total_cost);

}

/**************************************************************************/

#include <stdio.h>

#define WALK_CAL (5)

#define STAND_CAL (2)

#define DRINK_CAL (20)

#define FOOD_CAL (40)

#define CALS_PER_POUND (3500)

int main()

{

int min_walking=-1;

int min_standing=-1;

int min_drinking=-1;

int min_eating=-1;

while ((min_walking<0) || (min_walking>720))

{

printf(" How many minutes were you walking ? :>");

scanf("%d",&min_walking);

}

while ((min_standing<0) || (min_standing>720))

{

printf(" How many minutes were you standing ? :>");

scanf("%d",&min_standing);

}

while ((min_drinking<0) || (min_drinking>720))

{

printf(" How many minutes were you drinking ? :>");

scanf("%d",&min_drinking);

}

while ((min_eating<0) || (min_eating>720))

{

printf(" How many minutes were you eating ? :>");

scanf("%d",&min_eating);

}

double calories = min_eating * FOOD_CAL + min_drinking * DRINK_CAL - min_walking*WALK_CAL - min_standing*STAND_CAL;

double weight = calories / CALS_PER_POUND;

printf(" You lost %6.3lf pounds today ! \n",-weight);

}

/**************************************************************************************/

#include <stdio.h>

#define FIRST_CAR_LENGTH (10)

#define NORMAL_CAR_LENGTH (8)

#define CAR_CAPACITY (4)

int main()

{

int iLoop;

int n=-1;

int legal_distance;

int num_trains;

int num_cars;

int excess_length;

int num_people;

while (n<0)

{

printf(" Please input N :>");

scanf("%d",&n);

}

for (iLoop=0; iLoop<n; iLoop++)

{

int maxTrackLength=-1;

int maxTrainLength=-1;

while ((maxTrackLength<0) || (maxTrackLength>10000))

{

printf(" What is the total length of the track in feet ? :>");

scanf("%d",&maxTrackLength);

}

while ((maxTrainLength<10) || (maxTrainLength>100))

{

printf(" What is the max length of the train in feet ? :>");

scanf("%d",&maxTrainLength);

}

legal_distance = maxTrackLength/4;

num_trains = legal_distance/maxTrainLength;

num_cars = (maxTrainLength - FIRST_CAR_LENGTH)/NORMAL_CAR_LENGTH +1;

num_people = num_cars * CAR_CAPACITY * num_trains;

excess_length = (maxTrainLength - FIRST_CAR_LENGTH)%NORMAL_CAR_LENGTH;

printf(" Your ride can have at most %d people on it at a time. \n",num_people);

if (excess_length>0)

{

printf(" Maximum train length has a surplus of %d feet \n ",excess_length);

}

else

{

printf(" Maximum train length fits exactly \n");

}

} //for loop

}