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Can someone please explain to me why the output from the following code is saying that arrays are not equal?
int main() { int iar1[] = {1,2,3,4,5}; int iar2[] = {1,2,3,4,5}; if (iar1 == iar2) cout << "Arrays are equal."; else cout << "Arrays are not equal."; return 0; } 
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Algorithm to check if two arrays are equal or notInput the number of elements of arr1 and arr2. Input the elements of arr1 and arr2. If all the elements of arr1 and arr2 are equal, then print "Same". Else, print "Not Same".
The Arrays. equals() method checks the equality of the two arrays in terms of size, data, and order of elements. This method will accept the two arrays which need to be compared, and it returns the boolean result true if both the arrays are equal and false if the arrays are not equal.
For arrays, the equals() method is the same as the == operator. So, planes1. equals(planes2) returns true because both references are referring to the same object.
Java provides a direct method Arrays. equals() to compare two arrays. Actually, there is a list of equals() methods in the Arrays class for different primitive types (int, char, ..etc) and one for Object type (which is the base of all classes in Java).
if (iar1 == iar2) Here iar1 and iar2 are decaying to pointers to the first elements of the respective arrays. Since they are two distinct arrays, the pointer values are, of course, different and your comparison tests not equal.
To do an element-wise comparison, you must either write a loop; or use std::array instead
std::array<int, 5> iar1 {1,2,3,4,5}; std::array<int, 5> iar2 {1,2,3,4,5}; if( iar1 == iar2 ) { // arrays contents are the same } else { // not the same } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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