View Compilation Error

0_0_33211054_12100.cpp: In function 'void ReadAnsDealData()':
0_0_33211054_12100.cpp:55:6: error: 'i' was not declared in this scope
  for(i=0;i<M;++i)
      ^
0_0_33211054_12100.cpp: In function 'int main()':
0_0_33211054_12100.cpp:81:7: error: 'i' was not declared in this scope
   for(i=0;i<M;++i)
       ^