How do I get that jmoisjdg09sjfepokf09serkperklf-ekf

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C++

#include<iostream>

using namespace std;

int fact(int);

int main()
{
    int a=5,b;
    b=fact(a);
    cout<<b;
    return 0;
}

int fact(int);
{
     int a=6,b;
    b=fact(a);
    cout<<b;
    return 0;
}

int fact(int n)
{
    int i=1,j=1;
    while(i<=n)
    {
    j=j*i;
    i=i+1;
    }
    return j;
}

What I have tried:

it showing expected unqualified-id before ‘{’ token
{

Posted 24-Sep-18 1:28am

Member 13995503

Updated 24-Sep-18 1:50am

CPallini

v2

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ZurdoDev 24-Sep-18 7:43am

Your title broke.

2 solutions

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CPallini · Answer 1 · 2018-09-24T01:43:00

Solution 1

Quote:
int fact(int);
{
int a=6,b;
b=fact(a);
cout<<b;
return 0;
}

That is completely wrong on so many layers...

If you remove that, your code, though no beautiful, will work.

Posted 24-Sep-18 1:43am

CPallini

OriginalGriff · Answer 2 · 2018-09-24T01:50:00

You are declaring a "forward reference" function called fact :

C++

int fact (int);

You can't give that a body, or it wouldn't be a forward reference!
Remove the body (and the foreward reference, since you have it twice), and your code will then compile:

C++

#include<iostream>
using namespace std;
int fact (int);
int main ()
{
  int a = 5, b;
  b = fact (a);
  cout << b;
  return 0;
}

int fact (int n)
{
  int i = 1, j = 1;
  while (i <= n)
    {
      j = j * i;
      i = i + 1;
    }
  return j;
}

But, I'd replace the while loop with a for:

int fact (int n)
{
  int j = 1;
  for (int i = 1; i <= n; i++)
    {
      j = j * i;
    }
  return j;
}