View Compilation Error

0_0_29674110_21374.cpp: In function 'int main()':
0_0_29674110_21374.cpp:34:17: error: 'b' was not declared in this scope
     scanf("%d",&b[i]);
                 ^
0_0_29674110_21374.cpp:38:19: error: 'b' was not declared in this scope
    printf("%d ",a[b[i]+1]);
                   ^