View Compilation Error

0_0_24913830_32573.cpp: In function 'int main()':
0_0_24913830_32573.cpp:29:13: error: 'x' was not declared in this scope
           p[x]=y;//合并为一个值。
             ^
0_0_24913830_32573.cpp:29:16: error: 'y' was not declared in this scope
           p[x]=y;//合并为一个值。
                ^