Elso 6 feladat

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 141
#define M 40
FILE *f;

int main()
{

    printf("\n1.feladat: \n");

    int i,db,j;
    char fiu[N][M],lany[N][M],tanc[N][M];

    f=fopen("tancrend.txt","r+");
    i=0;
    while(!feof(f))
    {
        fscanf(f,"%s",&tanc[i]);
        fscanf(f,"%s",&lany[i]);
        fscanf(f,"%s",&fiu[i]);
        i++;
    }

    db=i-1;
    for(i=0;i<db;i++)
        printf("%s %s %s\n",tanc[i],lany[i],fiu[i]);


    printf("\n2.feladat: \n");

    printf("%s\n",tanc[0]);
    printf("%s\n",tanc[db-1]);

    printf("\n3.feladat: \n");

    int db1;

    db1=0;
    for(i=0;i<N;i++)
        if (strcmp(tanc[i], "samba") == 0)
            db1++;
    printf("%d\n",db1);

    printf("\n4.feladat:\n");

    for(i=0;i<N;i++)
        if(strcmp(lany[i], "Vilma") == 0)
            printf("%s\n",tanc[i]);

    printf("\n5.feladat: \n");

    char nev[N];

    printf("\nkerem a nevet: ");
    scanf("%s",&nev);

    int voltVilma = 0;
    for(i=0;i<db;i++)
        if(strcmp(tanc[i],nev)==0)
        {
            if(strcmp(lany[i],"Vilma")==0)
            {
                printf("A %s bemutatojan Vilma parja %s volt.\n",nev,fiu[i]);
                voltVilma = 1;
            }
        }
    if (voltVilma == 0)
        printf("Vilma nem tancolt %s-t\n", nev);


    printf("\n6.feladat: \n");

    char lany1[N][M],fiu1[N][M];
    int lanyok=0, fiuk=0;

    for(i=0;i<db;i++) {
        // ezt a lanyt ismerjuk-e mar?
        int vanmar = 0; // meg nem
        for (j=0; j<lanyok; j++) {
            if (strcmp(lany1[j], lany[i]) == 0)
                vanmar = 1;
        }
        if (vanmar == 0) {
            // Uj lany
            strcpy(lany1[lanyok], lany[i]);
            lanyok++;
        }

        // ezt a fiut ismerjuk-e mar?
        vanmar = 0; // meg nem
        for (j=0; j<fiuk; j++) {
            if (strcmp(fiu1[j], fiu[i]) == 0)
                vanmar = 1;
        }
        if (vanmar == 0) {
            // uj fiu
            strcpy(fiu1[fiuk], fiu[i]);
            fiuk++;
        }
    }

    printf("Lanyok:");
    for (i=0; i<lanyok; i++) {
        if (i > 0)
            printf(",");
        printf(" %s",lany1[i]);
    }
    printf("\n");

    printf("Fiuk:");
    for (i=0; i<fiuk; i++) {
        if (i > 0)
            printf(",");
        printf(" %s",fiu1[i]);
    }
    printf("\n");

    return 0;
}