passing two 2-d arrays into a function for comparison - c

Question

I have been trying to pass two arrays into a function so that I can compare them but I am having trouble with the syntax of how to pass the arrays and begin to compare the rows. I am getting errors such as incompatible pointer types pass to type const char???? here is the code I have so far...im having trouble in the top sort function
//
#define MAXROWS 30
#define MAXCOLS 100
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char topsort( char, int, char, int);
int main(int argc, const char * argv[])
{
//array for all of the word's in the file
char list[MAXROWS][MAXCOLS], line[MAXCOLS], constraint[MAXROWS][MAXCOLS];
FILE *list_sort;
int listcols = 0, listrows = 0, concols = 0, conrows = 0;
//open the sequential access file and make sure its found
list_sort = fopen("/Volumes/JENN/cpma stuff/introcompsys/list sort.txt","r");
if(list_sort == NULL){
printf("can't open file");
exit(EXIT_FAILURE);
}
while(fgets(line, sizeof(line), list_sort) != NULL)
{
if(index(line, ',') == NULL){
for(listcols =0; listcols< strlen(line)-1 ;++listcols) {
list[listrows][listcols] = line[listcols];
}
list[listrows][listcols] = '\0';
printf("%s\n", list[listrows]); //print each row of the list to check
++listrows;
}
else{
for(concols =0; concols< strlen(line)-1 ;++concols) {
constraint[conrows][concols] = line[concols];
}
constraint[conrows][concols] = '\0';
printf("%s\n", constraint[conrows]); //print each row of the constraint to
//check
++conrows;
}
}
}
char topsort( char s1[][MAXCOLS], int listrows, char s2[][MAXCOLS], int conrows){
char sorted[MAXROWS][MAXCOLS];
while(the constraint array is not empty){ //pseudocode
int second = char *strchr(s2, ‘,’+ 2);
for(int i = 0; i < listrows ; i++){
for(int j = 0; j < conrows; j++){
strcspn(s2[j][second], s1[i]);
}
}
}
}

Answer 1

Multiple problems with topsort. It's not going to work.
This is a bad idea:
char s1[][MAXCOLS]
Either specify all the dimension sizes, or use char **.
This is wrong, for several reasons.
int length = strlen(s2[][]);
You don't give any array indexes, you're passing a char to a function that takes a char *, and you are using length in a while loop and never changing it.
strlen(&s1)
This is passing a char * * * to a function expecting a char *.
strcspn(s2[i], s1[i]);
passing two chars to a function that takes a char and a char *. Plus you don't even see the result.