Reading line by line and assigning to array in C

Question

I want to read below lines in input.txt file in C program and assign it to variables.

 (1,3) (4,8)
 (3,6) (3,10)
 (2,6) (4,56)

...it has to read more than 100 lines and draw lines with 4 values in each line.

I was using fgets and sscanf, but I am not able to get the value and below was my code.

static const char filename[] = "src/input.txt";
FILE *file = fopen ( filename, "r" );

if ( file != NULL )
{
    char line [ 128 ]; 
    int i,j,k,l=-1;

    while ( fgets ( line, sizeof line, file ) != NULL )
    {
        fputs ( line, stdout ); /* write a line */            
        sscanf (line,"%d" "%d" "%d" "%d", i,j, k,l); 
    }
    fclose ( file );
}

See this: http://stackoverflow.com/questions/9206091/going-through-a-text-file-line-by-line-in-c and this: http://stackoverflow.com/questions/4600797/read-int-values-from-a-text-file-in-c — ROMANIA_engineer, Sep 20 '14 at 23:29
I want to read four integers in each line and draw a line and I can't paste my code because its giving so many errors and I have been trying for half an hour — user3091801, Sep 20 '14 at 23:44
As you go further in C programming, take a look at `getline` for line input as opposed to `fgets`. The primary advantage is that if you provide an unallocated pointer to `getline` it will allocate space as needed in addition to returning the number of characters successfully read. `fgets` is fine here, but put `getline` in your hip pocket for later. — David C. Rankin, Sep 21 '14 at 00:46

score 0 · Answer 1 · answered Sep 20 '14 at 23:52

0

In scanf replace i, j, k,l with addresses &i, &j,&k,&l

answered Sep 20 '14 at 23:52

radar

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Reading line by line and assigning to array in C

1 Answers1