View Compilation Error

0_0_16985671_20555.cpp: In function 'int main()':
0_0_16985671_20555.cpp:22:14: error: expected primary-expression before '=' token
      num[k]^ = num[j]^ = num[k]^ = num[j];
              ^
0_0_16985671_20555.cpp:22:24: error: expected primary-expression before '=' token
      num[k]^ = num[j]^ = num[k]^ = num[j];
                        ^
0_0_16985671_20555.cpp:22:34: error: expected primary-expression before '=' token
      num[k]^ = num[j]^ = num[k]^ = num[j];
                                  ^