View Compilation Error

0_0_17419601_12000.cpp: In function 'int main()':
0_0_17419601_12000.cpp:43:8: error: 'x' was not declared in this scope
      C[x++]=tempB[j];
        ^
0_0_17419601_12000.cpp:44:13: error: 'x' was not declared in this scope
   for(i=0;i<x;i++)
             ^