Question

I have the following codeblock I’m using for German verb drills:

if (strcmp(*option, "sein") == 0)
    *option = linie.sein;

if (strcmp(*option, "haben") == 0)
    *option = linie.haben;

if (strcmp(*option, "possessiv") == 0)
    *option = linie.possessiv;

if (strcmp(*option, "reflexiv") == 0)
    *option = linie.reflexiv;

if (strcmp(*option, "accusativ") == 0)
    *option = linie.accusativ;

if (strcmp(*option, "dativ") == 0)
    *option = linie.dativ;

However I would like to condense it to something like:

*option = linie.(*option);

Or perhaps:

*option = linie.(*option)();

Unfortunately neither of these work. Any ideas?

Edit @dasblinkenlight:

typedef struct
{
    char subjekt[20];
    char sein[20];
    char haben[20];
    char possessiv[20];
    char reflexiv[20];
    char accusativ[20];
    char dativ[20];
} satz;

satz linie =
{
    .subjekt = "",
    .sein = "",
    .haben = "",
    .possessiv = "",
    .reflexiv = "",
    .accusativ = "",
    .dativ = ""
};

char *option = argv[1];

Answer 1

You are mixing compile-time and runtime options. In C, you can’t use an identifier directly from a string got at runtime. However, you can bring your comparaisons into an opaque function.

char *f(const satz *linie, const char *option)
{
    if (strcmp(option, "sein") == 0)
        return linie->sein;
    else if (strcmp(option, "haben") == 0)
        return linie->haben;
    else if (strcmp(option, "possessiv") == 0)
        return linie->possessiv;
    else if (strcmp(option, "reflexiv") == 0)
            return linie->reflexiv;
    else if (strcmp(option, "accusativ") == 0)
        return linie->accusativ;
    else if (strcmp(option, "dativ") == 0)
        return linie->dativ;
    else
        return NULL;
}

*option = f(&linie, *option);