/in/foo.cc: In function 'int decToBin(int)':
/in/foo.cc:32:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:66:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
         for(int i=0;i<5;i++)
         ^~~
/in/foo.cc:67:23: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     scanf("%s",ch[i]);m.key=0;
                       ^