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carraysstructmallocrealloc

Allocating array of struct with array inside

I want to read users input combined of strings and numbers, like this:

50:string one
25:string two blablabla
...

I don't know how many of the lines the input will have and I also don't know maximum length of the strings.

So I created

typdedef struct line
{ 
    int a
    char *string
} line;

Then an array of this sturct

line *Array = NULL;

Now I have a cycle, that reads one line and parses it to temporaryString and temporaryA. How can I realloc the Array to copy these into the array?

Solution

  • You could something like this (pseudo code).

    idx = 0;

while (input = read()) {
    temporaryString, temporaryA = parse(input);
    Array = realloc(Array, (idx + 1)*sizeof(line));
    Array[idx].a = temporaryA;
    Array[idx].string = malloc(strlen(temporaryString) + 1);
    strcpy(Array[idx].string, temporaryString);
    idx++;
}