/in/foo.c: In function 'main':
/in/foo.c:16:19: error: 's' undeclared (first use in this function)
  int count=Count1(s, n)+Count2(s,n);
                   ^
/in/foo.c:16:19: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:15:6: warning: unused variable 'kk' [-Wunused-variable]
  int kk=1;//计数器 计算区域数
      ^~
/in/foo.c:14:6: warning: unused variable 'mm' [-Wunused-variable]
  int mm=0; //计数器 计算连续的0(或者1)出现了多少次
      ^~
/in/foo.c:13:7: warning: unused variable 'txm' [-Wunused-variable]
  char txm[50]={1};
       ^~~
/in/foo.c: In function 'Count1':
/in/foo.c:28:23: error: 'kk' undeclared (first use in this function)
   int count=Circle(n, kk, i, s);
                       ^~
/in/foo.c:28:30: warning: passing argument 4 of 'Circle' makes integer from pointer without a cast [-Wint-conversion]
   int count=Circle(n, kk, i, s);
                              ^
/in/foo.c:5:5: note: expected 'int' but argument is of type 'char *'
 int Circle(int n, int kk, int i, int s);
     ^~~~~~
/in/foo.c:28:7: warning: unused variable 'count' [-Wunused-variable]
   int count=Circle(n, kk, i, s);
       ^~~~~
/in/foo.c:31:9: error: 'count' undeclared (first use in this function); did you mean 'Count2'?
  return count;
         ^~~~~
         Count2
/in/foo.c: In function 'Count2':
/in/foo.c:41:23: error: 'kk' undeclared (first use in this function)
   int count=Circle(n, kk, i, s);
                       ^~
/in/foo.c:41:30: warning: passing argument 4 of 'Circle' makes integer from pointer without a cast [-Wint-conversion]
   int count=Circle(n, kk, i, s);
                              ^
/in/foo.c:5:5: note: expected 'int' but argument is of type 'char *'
 int Circle(int n, int kk, int i, int s);
     ^~~~~~
/in/foo.c:41:7: warning: unused variable 'count' [-Wunused-variable]
   int count=Circle(n, kk, i, s);
       ^~~~~
/in/foo.c:44:9: error: 'count' undeclared (first use in this function); did you mean 'Count2'?
  return count;
         ^~~~~
         Count2
/in/foo.c: In function 'Circle':
/in/foo.c:53:3: error: 'flag' undeclared (first use in this function); did you mean 'float'?
   flag=0;
   ^~~~
   float
/in/foo.c:54:4: error: subscripted value is neither array nor pointer nor vector
   s[i]=flag;
    ^
/in/foo.c:55:3: error: 'count' undeclared (first use in this function); did you mean 'Count2'?
   count=1;
   ^~~~~
   Count2
/in/foo.c: In function 'Count1':
/in/foo.c:33:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'Count2':
/in/foo.c:46:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'Circle':
/in/foo.c:59:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^