Understanding C Language String Sorting

#include<stdio.h>
# include <string.h>

void swap(char*a,char*b){
    chat[10];
    strcpy(t,a);
    strcpy(a,b);
    strcpy(b,t);
}

void sort(chars[][6], intn, intf){
    inti,j,t;
    if(f==0){
        for(i=1;i<n;i++){
            for(j=1;j<n;j++){
                if(strcmp(s[j-1], s[j])>0){
                    strcpy(t,s[j-1]);
                    strcpy(s[j-1], s[j]);
                    strcpy(s[j],t);
                }
            }
        }
    }
    else{
            for(i=1;i<n;i++){
                for(j=1;j<n;j++){
                    if(strcmp(s[j-1], s[j])<0){
                        strcpy(t,s[j-1]);
                        strcpy(s[j-1], s[j]);
                        strcpy(s[j],t);
                    }
                }
            }
    }
}

void main()
{
    inti,n;
    char sin[9][6];
    charcom[16];
    FILE*fp;

    fp = fopen("before_sort2.txt", "r");

    if(fp==NULL){
        printf("File Open Failed\n";
        return-1;
    }

    for(i=0;i<9;i++){
        fscanf(fp, "%s", &(sin[i])));
    }
    fclose(fp);

    printf("command>");
    scanf("%s",com);
    if(strcmp(com, "ASC")==0){
        sort(sin,9,0);
    }
    else if(strcmp(com, "DESC")==0){
        sort(sin,9,1);
    }

    for(i=0;i<9;i++){
        printf("%s\n", sin[i]);
    }
}