View Compilation Error

0_0_30428863_19806.cpp: In function 'int main()':
0_0_30428863_19806.cpp:6:10: error: conflicting declaration 'char c'
     char c;
          ^
0_0_30428863_19806.cpp:5:11: note: previous declaration as 'int c'
     int b,c;
           ^