How to properly scanf things from txt file in c

This is my code and what am I trying to do is to fscanf from file that is structured like this:

Tom Veri 1234567890 HJA
Peter Schmit 9874561230 ABA
Jhon Smart 0192837465 DPA
Harry Tompson 0912354876 PHA

And after compiling my output is weird why that happens:
Code is below

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

int nOfLines(FILE* file);

struct inputAbc
{
    char ime[20+1];
    char prezime[20+1];
    char jmbg[20+1];
    char sign[3+1];
};

int main()
{
    int nLines, i;
    FILE* input = NULL;
    FILE* output;
    struct inputAbc model_arr[10];

    input = fopen("input.txt", "r");
    output = fopen("output.txt", "w");
    nLines = nOfLines(input);
    //printf("%d\n", nLines+1);

    for(i = 0; i < nLines+1; i++)
    {
        fscanf(input ,"%s %s %s %s", 
        model_arr[i].ime, model_arr[i].prezime, 
        model_arr[i].jmbg, model_arr[i].sign);
    }
    for(i = 0; i < nLines+1; i++)
    {
        fprintf(output, 
            "ime: %s\nprezime: %s\njmbg: %s\nznakovlje: %s\n\n", 
            model_arr[i].ime, model_arr[i].prezime,
            model_arr[i].jmbg, model_arr[i].sign);
    }

    return 0;
}

int nOfLines(FILE *file)
{
    int lines = 0;
    int index;
    while(!feof(file))
    {
        index = fgetc(file);
        if(index == '\n')
            lines++;
    }
    return lines;
}

the following proposed code:

1. cleanly compiles
2. performs the desired functionality
3. produces the desired output
4. eliminates some of the 'magic' numbers
5. eliminates unneeded variables
6. is commented to assist OP in understanding the code
7. uses 'max character' modifiers in the fscanf() to avoid any possibility of a buffer overflow and the resulting undefined behavior
8. eliminates: #include <string.h> because none of the associated functionality is used in the posted code
9. properly cleans up (by closing open files) before exiting.
10. properly checks for I/O errors for fopen() and fscanf()
11. used size_t for variables i and j as they can never be less than 0

and now, the proposed code:

#include <stdio.h>
#include <stdlib.h>
struct inputAbc
{
char ime[20+1];
char prezime[20+1];
char jmbg[20+1];
char sign[3+1];
};
#define MAX_LINES    10
int main( void )
{
FILE* input  = NULL;
FILE* output = NULL;
struct inputAbc model_arr[ MAX_LINES ];
if( (input = fopen("input.txt", "r")) == NULL )
{
perror( "fopen to read 'input.txt' failed" );
exit( EXIT_FAILURE );
}
// implied else, fopen for input successful
if( (output = fopen("output.txt", "w") ) == NULL )
{
perror( "fopen to write 'output.txt' failed" );
fclose( input );
exit( EXIT_FAILURE );
}
// implied else, fopen for output successful
size_t i;  // file global scope since needed in next code block
for( i = 0; i < MAX_LINES; i++ )
{ 
if( fscanf(input ,"%20s %20s %20s %3s", 
model_arr[i].ime, 
model_arr[i].prezime, 
model_arr[i].jmbg, 
model_arr[i].sign) != 4 )
{
break;
}
}
for( size_t j = 0; j < i; j++ )
{
fprintf(output, 
"ime: %s\nprezime: %s\njmbg: %s\nznakovlje: %s\n\n", 
model_arr[j].ime, 
model_arr[j].prezime,
model_arr[j].jmbg, 
model_arr[j].sign);
}
fclose( input );
fclose( output );
return 0;
}