Bool function to check if two arrays are identical

[Zackfriedman]

hello, I need to write a bool function that checks if two 1D arrays of equal length are identical. I've written a seemingly straightforward loop to check that, however in practice, the program will always return whatever Boolean value is put in place after the if statement in the code bellow. I can't figure out where i'm going wrong and any help would be greatly appreciated. thanks in advance.

bool equalarrays(int a[], int b[], int n){
for(int i = 0; i < n; i++)  
{  
        for(int j = 0; j < n; j++)
        { 
 
                if (a[i] != b[j])
                {
                return false;
                }
        else
        return false;
        }
}  
}

[Thomas1965]

What does identical mean? All the same numbers only, or the same numbers in the same order?

[Zackfriedman]

identical meaning that each index is equal to the corresponding index;
a[5] = {1,2,3,4,5}
b[5] = {1,2.3,4,5} would return true while

a[5] = {1,2,3,4,5}
b[5] = {5,1,2,3,4} would return false.

so same numbers in same order

[Thomas1965]

Then you need only one loop.

bool equalarrays(int a[], int b[], int n)
{
  for (int i = 0; i < n; i++)
  {
    if (a[i] != b[i])
    {
      return false;
    }
  }
  return true;
}

[Zackfriedman]

thanks. that makes more sense.

[JLBorges]

#include <algorithm>

// http://en.cppreference.com/w/cpp/algorithm/equal
bool equal_arrays( const int a[], const int b[], std::size_t n ) { return std::equal( a, a+n, b ) ; }