C and pointer in a function - changes do not save

Question

I have this simple code that seems to work (I checked with the debugger) but when the function execution ends, the string is not saved in the original variable.

Answer 1

getString takes a pointer by value so cannot change the caller's pointer. Pass a pointer to a pointer if you want to reallocate the string

int main()
{
    ....
    getString(&inputText);
    ....
}

void getString(char **iText)
{
    char c;
    int i=0;
    while((c=getchar()) != '\n')
    {
        *iText = realloc(*iText, i+1);
        (*iText)[i]=c;
        i++;
    }

    *iText = realloc(*iText, i+1);  
    (*iText)[i]='\0';
}

I've made one other small change to your code - sizeof(char) is guaranteed to be 1 so the realloc calculations can be simplified