View Compilation Error

0_0_22749741_24843.cpp: In function 'int main()':
0_0_22749741_24843.cpp:42:25: error: 'a' was not declared in this scope
             scanf("%d",&a[i]);
                         ^
0_0_22749741_24843.cpp:45:25: error: 'a' was not declared in this scope
             printf("%d",a[i]);
                         ^