0_0_35909433_677.cpp: In function 'int main()': 0_0_35909433_677.cpp:15:17: error: 'i' was not declared in this scope arr[i]=((a*arr[i-1]+b*arr[i-2])%7); ^ 0_0_35909433_677.cpp:16:17: error: 'z' was not declared in this scope cout<<a[z]<<endl; ^