View Compilation Error

0_0_26635151_22320.cpp: In function 'int main()':
0_0_26635151_22320.cpp:55:19: error: 'average3' was not declared in this scope
    printf("%.2f ",average3[a]);
                   ^
0_0_26635151_22320.cpp:57:19: error: 'average3' was not declared in this scope
   printf("%.2f\n",average3[course-1]);
                   ^