foo.cc:15:23: error: expected ')' before ';' token
 int c(char s1[],int n1;char s2[],int n2)
                       ^
foo.cc:15:29: error: storage size of 's2' isn't known
 int c(char s1[],int n1;char s2[],int n2)
                             ^~
foo.cc:15:34: error: expected unqualified-id before 'int'
 int c(char s1[],int n1;char s2[],int n2)
                                  ^~~
foo.cc: In function 'int main()':
foo.cc:37:17: error: expected primary-expression before '%' token
      scanf("%d",%x);
                 ^
foo.cc:47:22: error: too many arguments to function 'int c(char*, int)'
       num=c(t,l,s2,n2);
                      ^
foo.cc:15:5: note: declared here
 int c(char s1[],int n1;char s2[],int n2)
     ^
foo.cc:58:5: error: expected ';' before 'return'
     return 0;
     ^~~~~~
foo.cc:32:13: warning: unused variable 'n1' [-Wunused-variable]
     int num,n1,n2,l,k,n;
             ^~

[Hydro](https://hydro.ac)提供评测服务