Question

Write a working C program that will do the following:

1.Include your name, Lab Test number, and studentId as comments in the first lines of theprogram

2.User is first prompted to enter an integer number between 1 and 20, to be stored asvariable named number. If the number is outside the range 1-20, the program will end.

3.If the number is within the allowed range, variable number is passed to function multF().The multF() function computes and returns the result of: 1 x 1/2 x 1/3 x .... x 1/n using aloop, where n is a number entered by the user.

4.The result is then returned to main() and displayed on the screen (from main()!).

Answer 1

Code:

/*
* Write Your Name, LabTestNumber, studentId here
*/

#include <stdio.h>

// Function to compute 1 x 1/2 x 1/3 x .... x 1/n using aloop where n is passed perimeter
double multF(int number) {
double value = 1;
// loop i from 1 to number
for(int i = 1; i<= number; i++) {
value = value * 1/i;
}
return value;
}

int main()
{
int number;
printf("Enter a number between 1 and 20: ");
// scanf ask user to enter the number
scanf("%d",&number);
// compute only when number is between 1 and 20
if(number >= 1 && number <= 20) {
// %g displays the computed value in either decimal representation or scientific notation.
printf("%g",multF(number));
}
return 0;
}
Screenshot of code:

} main.c 1- /* 2 * Write Your Name, LabtestNumber, studentId here 3 */ 4 5 #include <stdio.h> 6 7 // Function to compute 1 x 1/2 x 1/3 x .... x 1/n using aloop where n is passed perimeter 8 double multF(int number) { 9 double value = 1; 10 // Loop i from 1 to number 11 - for(int i 1; i<= number; i++) { 12 value = value * 1/i; 13 14 return value; 15 } 16 17 int main() 18 { 19 int number; 20 printf("Enter a number between 1 and 20: "); 21 // scanf ask user to enter the number 22 scanf("%d",&number); 23 // compute only when number is between 1 and 20 24 if(number >= 1 && number <= 20) { 25 // %g displays the computed value in either decimal representation or scientific notation. 26 printf("%g",multF(number)); 27 28 return 0; 29 } 30 }

Output:

Enter a number between 1 and 20: 5 0.00833333 ... Program finished with exit code 0 Press ENTER to exit console. I

Enter a number between 1 and 20: 15 7.64716e-13 Program finished with exit code 0 Press ENTER to exit console. I

Note: If you want your output to be displayed as decimal representation only not in scientific notation then In line 26 instead of using "%g" use "%0.25f" or "%0.30f". "%0.25f" will display 25 digits after decimal point and "%0.30f" will display 30 digits after decimal point.

If you're still having any doubt then please feel free to ask in the comment section.