View Compilation Error

0_0_17918859_15335.cpp: In function 'int main()':
0_0_17918859_15335.cpp:8:17: error: expected initializer before 'b'
    int a[100000]b[100000];
                 ^
0_0_17918859_15335.cpp:16:25: error: 'b' was not declared in this scope
             scanf("%d",&b[j]);
                         ^
0_0_17918859_15335.cpp:19:22: error: 'b' was not declared in this scope
             if(a[i]==b[0])
                      ^