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:47:16: 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:32:9: warning: unused variable 'n1' [-Wunused-variable]
 int num,n1,n2,l,k,n;
         ^~
foo.cc:37:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d",&x);
 ~~~~~^~~~~~~~~

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