View Compilation Error

0_0_23464324_30486.cpp: In function 'void ReadAnsDealData()':
0_0_23464324_30486.cpp:55:9: error: 'i' was not declared in this scope
     for(i=0;i<M;++i)  
         ^
0_0_23464324_30486.cpp: In function 'int main()':
0_0_23464324_30486.cpp:81:13: error: 'i' was not declared in this scope
         for(i=0;i<M;++i)  
             ^