A. Given a = 5, b = 1, x = 10, and y = 5, create a program that

outputs the result of the formula f = (a b)(x y) using a
single printf() function.

B. Create a program that uses the same formula above to output
the result; this time, however, prompt the user for the values
a, b, x, and y. Use appropriate variable names and naming
conventions.

A. Sure! Here's a program that uses a single printf() function to output the result of the formula f = (a * b) * (x * y):

```c
#include <stdio.h>

int main() {
int a = 5;
int b = 1;
int x = 10;
int y = 5;

int f = (a * b) * (x * y);

printf("The result of the formula f = (a * b) * (x * y) is: %d\n", f);

return 0;
}
```

B. Now let's create a program that prompts the user for the values of a, b, x, and y to calculate the formula f = (a * b) * (x * y):

```c
#include <stdio.h>

int main() {
int a, b, x, y;

printf("Enter the value of a: ");
scanf("%d", &a);

printf("Enter the value of b: ");
scanf("%d", &b);

printf("Enter the value of x: ");
scanf("%d", &x);

printf("Enter the value of y: ");
scanf("%d", &y);

int f = (a * b) * (x * y);

printf("The result of the formula f = (a * b) * (x * y) is: %d\n", f);

return 0;
}
```

Feel free to run the programs and let me know if you have any questions!

A:

To create a program that outputs the result of the formula f = (a*b)(x*y) using a single printf() function, you can follow these steps:

1. Include the necessary header file for input and output operations:
```
#include <stdio.h>
```

2. Define the values of a, b, x, and y:
```
#define a 5
#define b 1
#define x 10
#define y 5
```

3. Calculate the value of f using the formula:
```
int f = (a * b) * (x * y);
```

4. Create a printf() statement to output the result:
```
printf("The result of the formula is %d\n", f);
```

5. Compile and run the program to see the output.

B:

To create a program that prompts the user for the values of a, b, x, and y to calculate and output the result using the same formula, you can follow these steps:

1. Include the necessary header file for input and output operations:
```
#include <stdio.h>
```

2. Define variables for a, b, x, and y:
```
int a, b, x, y;
```

3. Prompt the user for the values of a, b, x, and y:
```
printf("Enter the value of a: ");
scanf("%d", &a);

printf("Enter the value of b: ");
scanf("%d", &b);

printf("Enter the value of x: ");
scanf("%d", &x);

printf("Enter the value of y: ");
scanf("%d", &y);
```

4. Calculate the value of f using the formula:
```
int f = (a * b) * (x * y);
```

5. Create a printf() statement to output the result:
```
printf("The result of the formula is %d\n", f);
```

6. Compile and run the program to prompt the user for the values and see the output.

To create a program that outputs the result of the given formula, you can follow the steps below:

A. Given predefined values (a = 5, b = 1, x = 10, and y = 5):
1. Include the necessary header file for input/output operations in C:
```c
#include <stdio.h>
```
2. Inside the main function, declare and initialize the given variables:
```c
int a = 5;
int b = 1;
int x = 10;
int y = 5;
```
3. Calculate the result using the formula:
```c
int f = (a * b) * (x * y);
```
4. Output the result using the printf() function:
```c
printf("The result is: %d\n", f);
```
The %d is a format specifier to print an integer value.

The complete code for the program would look like this:
```c
#include <stdio.h>

int main() {
int a = 5;
int b = 1;
int x = 10;
int y = 5;

int f = (a * b) * (x * y);
printf("The result is: %d\n", f);

return 0;
}
```

B. To create a program that prompts the user for the values of a, b, x, and y:
1. Include the necessary header file for input/output operations in C:
```c
#include <stdio.h>
```
2. Inside the main function, declare and initialize variables for a, b, x, and y:
```c
int a, b, x, y;
```
3. Prompt the user to enter the values of a, b, x, and y using printf() and scanf() functions:
```c
printf("Enter the value of a: ");
scanf("%d", &a);

printf("Enter the value of b: ");
scanf("%d", &b);

printf("Enter the value of x: ");
scanf("%d", &x);

printf("Enter the value of y: ");
scanf("%d", &y);
```
The & operator is used to get the address of the variable where the user input will be stored.

4. Calculate the result using the formula:
```c
int f = (a * b) * (x * y);
```
5. Output the result using the printf() function:
```c
printf("The result is: %d\n", f);
```
The %d is a format specifier to print an integer value.

The complete code for the program would look like this:
```c
#include <stdio.h>

int main() {
int a, b, x, y;

printf("Enter the value of a: ");
scanf("%d", &a);

printf("Enter the value of b: ");
scanf("%d", &b);

printf("Enter the value of x: ");
scanf("%d", &x);

printf("Enter the value of y: ");
scanf("%d", &y);

int f = (a * b) * (x * y);
printf("The result is: %d\n", f);

return 0;
}
```

By following these steps, you can create programs that output the result of the given formula, either with predefined values or by prompting the user for input.