View Compilation Error

0_0_37564784_21371.cpp: In function 'int main()':
0_0_37564784_21371.cpp:11:23: error: 'memset' was not declared in this scope
   memset(a,0,sizeof(a));
                       ^
0_0_37564784_21371.cpp:12:6: error: 'str1' was not declared in this scope
   if(str1==str2)cout<<"Equal"<<endl;
      ^
0_0_37564784_21371.cpp:12:12: error: 'str2' was not declared in this scope
   if(str1==str2)cout<<"Equal"<<endl;
            ^