Given a = 5, b=1, x=10, and y =5, create aprogram 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.

write a formular for aprogram generating the following patterns

A
AB
ABC
ABCD

To create a program that uses the given values and outputs the result of the formula f = (a * b)(x * y) using a single printf() function in C programming language, you can follow the steps below:

1. Open a text editor and create a new file with a .c extension (e.g., formula.c).

2. Write the necessary include statement to include the standard input/output library:
```c
#include <stdio.h>
```

3. Define the main function:
```c
int main() {

}
```

4. Inside the main function, declare the variables 'a', 'b', 'x', 'y' and 'f' with their appropriate data types:
```c
int a = 5, b = 1, x = 10, y = 5;
int f;
```

5. Calculate the value of 'f' using the formula provided:
```c
f = (a * b) * (x * y);
```

6. Use the printf() function to output the result 'f' to the console:
```c
printf("The result of the formula is: %d\n", f);
```

7. Save the file and compile it using a C compiler.

8. Run the compiled program, and you will see the result of the formula displayed on the console.

If you want to prompt the user for the values 'a', 'b', 'x', and 'y' instead of using the predefined values, you can modify the code as follows:

Replace step 4 above with the following code:
```c
int a, b, x, y;
int f;

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);
```

With these modifications, the program will prompt the user to enter the four values, and it will calculate and output the result based on the user's input.