View Compilation Error

0_0_30542817_23570.cpp: In function 'int main()':
0_0_30542817_23570.cpp:4:13: error: 'm' was not declared in this scope
  while(cin>>m)){
             ^
0_0_30542817_23570.cpp:4:15: error: expected primary-expression before ')' token
  while(cin>>m)){
               ^