View Compilation Error

0_0_27092003_20209.cpp: In function 'int main()':
0_0_27092003_20209.cpp:4:13: error: redeclaration of 'int B'
     int A,B,B,M;
             ^
0_0_27092003_20209.cpp:4:11: note: 'int B' previously declared here
     int A,B,B,M;
           ^
0_0_27092003_20209.cpp:8:31: error: 'C' was not declared in this scope
         scanf("%d%d%d",&A,&B,&C);
                               ^