MacBook-vas3k:~ vas3k$ cat xor.cpp
#include <stdio.h>

int main() {
    int a[] = {45, 23, 12, 67, 23};
    int b = 0;
    for (int i = 0; i < 5; i++) {
        b = b xor a[i];
    }
    printf("%d\n", b);
    return 0;
}


MacBook-vas3k:~ vas3k$ g++ xor.cpp
MacBook-vas3k:~ vas3k$ ./a.out
98