Homework #8 (C Programming for Beginners - OnLine)

Demo: The following code is a procedural way of writing code. It prints the weekly temperature, finds the min and max, and the average as well.

int weeklyTemp[] = { 69, 70, 71, 68, 66, 71, 70 }; int i, max = 0, min = 0;

// print temperatures

for (i = 0; i < 7; i++) {

printf("\nThe temperature on day %d "
"was %d: ", i + 1,

weeklyTemp[i]);

}
printf("\n\n");

    • find the max, min temperature for (i = 0; i < 7; i++) {

if (i == 0)

max = min = weeklyTemp[i];
if (weeklyTemp[i] > max)

max = weeklyTemp[i];

if (weeklyTemp[i] < min)
min = weeklyTemp[i];

}

printf("The Minimum temperature is: %d\n", min);
printf("The Maximum temperature is: %d\n", max);

// get average

float total = 0, average;
for (i = 0; i < 7; i++)

total += weeklyTemp[i];
average = total / 7;

printf("The average temperage for the week is: %5.2f ", average);

8.1 Now, modify the above code, which is all in one place, and break it into multiple functinos. Try to convert each piece of important code into a function.

    a) Write a function called getTemperatures. Which asks the user to enter 7 temperatures for the week

    b) Write a function called printTemperatures. Which prints the 7 temperatures for the week:

    c) Write a function called getMax, which returns the maximum temperature of the week.

    d) Write a function called getMin, which returns the minimum temperature of the week.
    e) Write a function called getAverage, which returns the average temperature of the week.

    f) Write a function called printStatistics that prints minimum, maximum and average of the week using above function

    g) Write the code in main function to call all these functions

Demo: Here is the solution for Homework# 4.6. It is written as a procedural program.

int counter1, counter2;

char hChar1, vChar1;

int    ht1, wd1;
char answer = 'y';

printf("\nUsing for-loop and user values, continuously:

\n");

while (answer == 'y') {

printf("\nPlease enter height of a box: "); scanf("%d", &ht1);

printf("\nPlease enter width of a box: "); scanf("%d", &wd1);

//you first need to flush the buffer, which still has //'\n' character due to pressing enter

while (getchar() != '\n');

printf("\nPlease enter the vertical charcters to draw box: ");

scanf("%c", &vChar1);

//don't forget to remove the newline character after //reading just a charcter in above code
while (getchar() != '\n');

printf("\nPlease enter the horizontal charcters to draw box: ");

scanf("%c", &hChar1);

printf("\n");

for (counter1 = 1; counter1 <= wd1; counter1++)

{
printf("%c", hChar1);

}

printf("\n");

for (counter1 = 1; counter1 <= ht1 - 2; counter1++)

{
printf("%c", vChar1);

for (counter2 = 1; counter2 <= wd1 - 2; counter2++)

printf(" ");

printf("%c\n", vChar1);
}

for (counter1 = 1; counter1 <= wd1; counter1++)

{
printf("%c", hChar1);

}
printf("\n");

//clean up the newline after last character read while (getchar() != '\n');

printf("Continue? Type 'y' for yes: "); scanf("%c", &answer);

}

8.2 Now, modify and break the above code into four functions:

    a) A function, drawHorizontalLine, which draws horizontal lines "-----------"

    b) A function, drawVerticalLine, which draws vertical lines

"|    |"
"|    |"
"|    |"

    c) A function, drawBox, which calls the drawHorizontalLine, and drawVerticalLine to draw the box

    d) Call drawBox from main function