View Compilation Error

0_0_13290695_28187.cpp: In function 'void getint(int&)':
0_0_13290695_28187.cpp:96:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while(C=getchar(),c<'0'||c>'9');
                      ^
0_0_13290695_28187.cpp:96:29: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while(C=getchar(),c<'0'||c>'9');
                             ^
0_0_13290695_28187.cpp:98:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while(C=getchar(),c>='0'&&c<='9')k=k*10+C-'0';
                       ^
0_0_13290695_28187.cpp:98:31: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while(C=getchar(),c>='0'&&c<='9')k=k*10+C-'0';
                               ^