/in/foo.c: In function 'main':
/in/foo.c:13:8: warning: implicit declaration of function 'WZ' [-Wimplicit-function-declaration]
  int a=WZ(char s[],int n,int m);
        ^~
/in/foo.c:13:11: error: expected expression before 'char'
  int a=WZ(char s[],int n,int m);
           ^~~~
/in/foo.c:14:8: warning: implicit declaration of function 'GZ' [-Wimplicit-function-declaration]
  int b=GZ(char s[],int n,int m);
        ^~
/in/foo.c:14:11: error: expected expression before 'char'
  int b=GZ(char s[],int n,int m);
           ^~~~
/in/foo.c:15:2: warning: implicit declaration of function 'print'; did you mean 'printf'? [-Wimplicit-function-declaration]
  print ("%d %d",a,b);
  ^~~~~
  printf