Implement a function in C++ to compute factorial of a integer number
Anonymous asked 3 years ago
# Implement a function in C++ to compute factorial of a integer number.
* The function should return -1 for negative numbers.
* Factorial of a number if a positive number.
* Do not add any additional prints in the code
# Sample input:
4
1
2
-1
0
# Explaination:
  * First line is the number of inputs.
  * Next lines are the integers to which the factorial needs to be found
 Â
# Sample output:
1
2
-1
1
# Explaination:
  * Factorial of 1 is 1
  * Factorial of 2 is 4
  * Factorial of -1 is -1
  * Factorial of 0 is 1
Anonymous answered 3 years ago
Here is the code:
#include<iostream>
using namespace std;
int main(){
  int n,i;
  cin>>n;
  int arr[n];
  for(i=0;i<n;i++){
    cin>>arr[i];
  }
  for(i=0;i<n;i++){
    if(arr[i]<0){
      arr[i]=-1;
    }
    else if (arr[i]==0)
    {
      arr[i]=1;
    }
    else
    {
      int f=1,j;
      for(j=1;j<=arr[i];j++){
        f*=j;
      }
      arr[i]=f;
    }
  }
  for(i=0;i<n;i++){
    cout<<arr[i]<<endl;
  }
  return 0;
}