Write a C program to do the following: a- read in an input integer from user and

Question

Write a C program to do the following: a- read in an input integer from user and compute the factorial of the input Fact(n)= n*(n-1)*(n-2)*...*3*2*1 Test your code and provide a snapshot of a working input such as n=6, and invalid input such as n= - 3, and n=A 1 Provide the code as part of your work paper b- Write a code that would generate 5 rand numbers between (1-12) in a loop and display a table with factorial values of the random numbers. The code should prompt user for an input of rows of table to display. Possible range of rows (1-5). The table example above was shown for an input of 3 rows supplied by user. Example of a run for the case of 3 rows Test your code and provide a snapshot of a working input such as rows R=3, and invalid input such as R= - 3, R=2.3, and R=A1 Provide the code as part of your work paper

Explanation / Answer

//To calculate factorial of a number.

#include <stdio.h>

int main()
{
    int n, i;
    unsigned long long factorial = 1;
  
    printf("Enter an integer: ");
    scanf("%d",&n);   //Taking input and storing in 'n'

    // If user enters a negative integer
    if (n < 0)
        printf("Error! Invalid Input. ");

    else
    {
        for(i=1; i<=n; i++)
        {
            factorial *= i;              // factorial = factorial*i;
        }
        printf("Factorial of %d = %llu ", n, factorial);
    }

    return 0;
}

//To generate and print factorial of those number.

#include <stdio.h>
#include <stdlib.h>

int main() {
int c, n,i;
unsigned long long factorial = 1;
printf("5 random numbers in [1,12] ");

for (c = 1; c <= 5; c++) {
    n = rand() % 12 + 1;
    //printf("%d ", n);
        for(i=1; i<=n; i++)
        {
            factorial *= i;              // factorial = factorial*i;
        }
        printf("%d %llu ", n, factorial);
        factorial =1;
}

return 0;
}

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