Question

So I have a question in regards to my program. I'm learning to program in C and I was curious about the use of functions. We don't

get into them in this class but I wanted to see how they work. Here is my program and I would like to create a function for each of my menu options.

I created a function to display and read the menu and the option that is entered, but I would like to see how I can make each menu option a function

as well as calculating the are and power as functions. Thanks. Any guidance would be great, the book doesn't go much into them.

#include<stdio.h>

#include<stdlib.h>

#include<math.h>

#define PI 3.14159

#define row 10

#define col 3

int menuOption(void);

int main()

{

//const int row = 10;

//const int col = 3;

int choice, loopcount, n = 1, flag = 1;

float x = 0.000001;

float tidalFlowSpeed;

float windSpeed;

float waterDensity = 1000;

float airDensity = 1.225;

float k = 0.40; //Let k = the power coefficient for wind.

float m = 0.35; //Let m = the power coefficient for marine.

float r, Area, Power;

float windTurbine[row][col];

float marineTurbine[row][col];

printf(" | uPower Corporation |\n");

printf("\t\t\t\t\t\t----------------------\n\n\n\n");

printf("Welcome analyst: |Chris Gorman| \n\n");

// set all to zero

for (int r = 0; r < row; ++r)

for (int c = 0; c < col; ++c)

{

windTurbine[r][c] = 0.0;

marineTurbine[r][c] = 0.0;

}

while (flag)

{

choice = menuOption();

switch (choice)

{

case 0:

printf("\n| User has exited |\n\n");

flag = 0;

break;//break case 0.

case 1:

printf("\n\n| Wind Turbine - Power Calculator |\n\n");

printf("User can enter up to 10 turbines.\n\n");

printf(">>Enter the number of turbines to be calculated: ");

scanf("%d", &n);

loopcount = 1;

while (loopcount <= n && loopcount < row + 1)

{

int index = loopcount - 1;

printf(">>Enter the radius for turbine |%d| in meters: ", loopcount);

scanf("%f", &r);

printf(">>Enter the wind speed for turbine |%d| in meters/second: ", loopcount);

scanf("%f", &windSpeed);

windTurbine[index][0] = r; //Turbine Radius

Area = PI * pow(r, 2); //Area

windTurbine[index][1] = windSpeed; //Wind Speed   

windTurbine[index][2] = ((airDensity * Area * pow(windSpeed, 3) * k) / 2) * x; //Power

printf("\n |Power = %.3f megawatts|\n\n", windTurbine[index][2]);

loopcount++;

printf("Data entered: %f : %f : %f\n", windTurbine[index][0], windTurbine[index][1], windTurbine[index][2]);

}

break;//break case 1.

case 2:

printf("\n\n| Marine Turbine - Power Calculator |\n\n");

printf("User can enter up to 10 turbines.\n\n");

printf(">>Enter the number of marine turbines to be calculated: ");

scanf("%d", &n);

loopcount = 1;

while (loopcount <= n && loopcount < row + 1)

{

int index = loopcount - 1;

printf(">>Enter the radius for turbine |%d| in meters: ", loopcount);

scanf("%f", &r);

printf(">>Enter the tidal flow speed for turbine |%d| in meters/second: ", loopcount);

scanf("%f", &tidalFlowSpeed);

marineTurbine[index][0] = r; //Turbine Radius

Area = PI * pow(r, 2); //Area

marineTurbine[index][1] = tidalFlowSpeed; //Tidal Flow Speed   

marineTurbine[index][2] = ((waterDensity * Area * pow(tidalFlowSpeed, 3) * k) / 2) * x; //Power

printf("\n |Power = %.3f megawatts|\n\n", marineTurbine[index][2]);

loopcount++;

printf("Data entered: %f : %f : %f\n", marineTurbine[index][0], marineTurbine[index][1], marineTurbine[index][2]);

}

break;//break case 2.

case 3:

printf("\n\| Analysis - Marine Turbine Specifications |\n\n");

printf(">>Enter the power of a wind turbine in megawatts: ");

scanf("%f", &Power);

printf(">>Enter the tidal flow speed in meters/second: ");

scanf("%f", &tidalFlowSpeed);

r = sqrt((2 * Power) / (waterDensity * PI * pow(tidalFlowSpeed, 3) * m)) * 1000;

printf("\n |Radius = %.3f meters|\n\n", r);

printf(">>The marine turbine radius has to be %.3f meters in order to produce %.3f megawatts of power.\n\n", r, Power);

break;//break case 3.

case 4:

printf("\n| Wind Turbine Data |:\n\n");

printf("Turbine Radius(m)\t\tWind Speed (m/sec)\t\tPower (MW)\n");

for (int r = 0; r < row; ++r)

if (windTurbine[r][0] != 0.0)

{

for (int c = 0; c < col; ++c)

printf("%f\t\t\t", windTurbine[r][c]);

printf("\n");

}

printf("\n| Marine Turbine Data |:\n\n");

printf("Turbine Radius(m)\t\tTidal Flow Speed (m/sec)\tPower (MW)\n");

for (int r = 0; r < row; ++r)

if (marineTurbine[r][0] != 0.0)

{

for (int c = 0; c < col; ++c)

printf("%f\t\t\t", marineTurbine[r][c]);

printf("\n");

}

break;//break case 4.

default:

printf("\n\nInvalid choice.\nPlease choose a valid menu option.\n\n");

break;//break default.

}//end swtich.

}//end while (flag).

}//end main.

int menuOption(void)

{

int choice = 0;

printf("\n----------MENU----------\n\n");

printf(" >> 0: Exit\n\n");

printf(" >> 1: Wind Turbine\n\n");

printf(" >> 2: Marine Turbine\n\n");

printf(" >> 3: Analysis\n\n");

printf(" >> 4: Turbine Table Data\n\n");

printf("\nPlease enter your choice: ");

scanf("%d", &choice);

return choice;

}

Answer 1

Here is code:

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#define PI 3.14159

#define row 10

#define col 3

int menuOption(void);
void windTurbinePowerCalculator(float windTurbine[row][col],float x,float k,float airDensity);
void marineTurbinePowerCalculator(float marineTurbine[row][col],float x,float k,float m,float waterDensity);
void analysisMarineTurbine(float m,float waterDensity);
void windTurbineDat(float windTurbine[row][col],float marineTurbine[row][col]);
int main()

{

    //const int row = 10;

    //const int col = 3;

    int choice, loopcount, n = 1, flag = 1;

    float x = 0.000001;

    float tidalFlowSpeed;
   float airDensity = 1.225;
    float waterDensity = 1000;

    float k = 0.40; //Let k = the power coefficient for wind.

    float m = 0.35; //Let m = the power coefficient for marine.

    float Area, Power;

    float windTurbine[row][col];

    float marineTurbine[row][col];
    int r, c;
    printf(" | uPower Corporation |\n");

    printf("----------------------\n\n\n\n");

    printf("Welcome analyst: |Chris Gorman| \n\n");

    // set all to zero

    for (r = 0; r < row; ++r)

        for (c = 0; c < col; ++c)

        {

            windTurbine[r][c] = 0.0;

            marineTurbine[r][c] = 0.0;
        }

    while (flag)

    {

        choice = menuOption();

        switch (choice)

        {

        case 0:

            printf("\n| User has exited |\n\n");

            flag = 0;

            break; //break case 0.

        case 1:

            windTurbinePowerCalculator(windTurbine,x,k,airDensity);

            break; //break case 1.

        case 2:

            marineTurbinePowerCalculator(marineTurbine,x,k,m,waterDensity);

            break; //break case 2.

        case 3:

            analysisMarineTurbine(m,waterDensity);
            break; //break case 3.

        case 4:
           windTurbineDat(windTurbine,marineTurbine);
            break; //break case 4.

        default:
          
            printf("\n\nInvalid choice.\nPlease choose a valid menu option.\n\n");

            break; //break default.

        } //end swtich.
    } //end while (flag).

} //end main.

int menuOption(void)

{

    int choice = 0;

    printf("\n----------MENU----------\n\n");

    printf(" >> 0: Exit\n\n");

    printf(" >> 1: Wind Turbine\n\n");

    printf(" >> 2: Marine Turbine\n\n");

    printf(" >> 3: Analysis\n\n");

    printf(" >> 4: Turbine Table Data\n\n");

    printf("\nPlease enter your choice: ");

    scanf("%d", &choice);

    return choice;
}

void windTurbinePowerCalculator(float windTurbine[row][col],float x,float k,float airDensity)
{
    int loopcount, n = 1;
    float Area, windSpeed;
    int r, c;
    printf("\n\n| Wind Turbine - Power Calculator |\n\n");

    printf("User can enter up to 10 turbines.\n\n");

    printf(">>Enter the number of turbines to be calculated: ");

    scanf("%d", &n);

    loopcount = 1;

    while (loopcount <= n && loopcount < row + 1)

    {

        int index = loopcount - 1;

        printf(">>Enter the radius for turbine |%d| in meters: ", loopcount);

        scanf("%f", &r);

        printf(">>Enter the wind speed for turbine |%d| in meters/second: ", loopcount);

        scanf("%f", &windSpeed);

        windTurbine[index][0] = r; //Turbine Radius

        Area = PI * pow(r, 2); //Area

        windTurbine[index][1] = windSpeed; //Wind Speed

        windTurbine[index][2] = ((airDensity * Area * pow(windSpeed, 3) * k) / 2) * x; //Power

        printf("\n |Power = %.3f megawatts|\n\n", windTurbine[index][2]);

        loopcount++;

        printf("Data entered: %f : %f : %f\n", windTurbine[index][0], windTurbine[index][1], windTurbine[index][2]);
    }
}

void marineTurbinePowerCalculator(float marineTurbine[row][col],float x,float k,float m,float waterDensity)
{
    int loopcount, n = 1, flag = 1;

    float tidalFlowSpeed;

    float Area;
    int r, c;

    printf("\n\n| Marine Turbine - Power Calculator |\n\n");

    printf("User can enter up to 10 turbines.\n\n");

    printf(">>Enter the number of marine turbines to be calculated: ");

    scanf("%d", &n);

    loopcount = 1;

    while (loopcount <= n && loopcount < row + 1)

    {

        int index = loopcount - 1;

        printf(">>Enter the radius for turbine |%d| in meters: ", loopcount);

        scanf("%f", &r);

        printf(">>Enter the tidal flow speed for turbine |%d| in meters/second: ", loopcount);

        scanf("%f", &tidalFlowSpeed);

        marineTurbine[index][0] = r; //Turbine Radius

        Area = PI * pow(r, 2); //Area

        marineTurbine[index][1] = tidalFlowSpeed; //Tidal Flow Speed

        marineTurbine[index][2] = ((waterDensity * Area * pow(tidalFlowSpeed, 3) * k) / 2) * x; //Power

        printf("\n |Power = %.3f megawatts|\n\n", marineTurbine[index][2]);

        loopcount++;

        printf("Data entered: %f : %f : %f\n", marineTurbine[index][0], marineTurbine[index][1], marineTurbine[index][2]);
    }
}

void analysisMarineTurbine(float m,float waterDensity)
{
    float Power, tidalFlowSpeed;
    int r;
    printf("\n\n| Analysis - Marine Turbine Specifications |\n\n");

    printf(">>Enter the power of a wind turbine in megawatts: ");

    scanf("%f", &Power);

    printf(">>Enter the tidal flow speed in meters/second: ");

    scanf("%f", &tidalFlowSpeed);

    r = sqrt((2 * Power) / (waterDensity * PI * pow(tidalFlowSpeed, 3) * m)) * 1000;

    printf("\n |Radius = %.3f meters|\n\n", r);

    printf(">>The marine turbine radius has to be %.3f meters in order to produce %.3f megawatts of power.\n\n", r, Power);
}

void windTurbineDat(float windTurbine[row][col],float marineTurbine[row][col])
{
   int r,c;
    printf("\n| Wind Turbine Data |:\n\n");

    printf("Turbine Radius(m)\t\tWind Speed (m/sec)\t\tPower (MW)\n");

    for (r = 0; r < row; ++r)

        if (windTurbine[r][0] != 0.0)

        {

            for (c = 0; c < col; ++c)

                printf("%f\t\t\t", windTurbine[r][c]);

            printf("\n");
        }

    printf("\n| Marine Turbine Data |:\n\n");

    printf("Turbine Radius(m)\t\tTidal Flow Speed (m/sec)\tPower (MW)\n");

    for (r = 0; r < row; ++r)

        if (marineTurbine[r][0] != 0.0)

        {
            for (c = 0; c < col; ++c)
                printf("%f\t\t\t", marineTurbine[r][c]);

            printf("\n");
        }
}

Output: