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From: ADLER1%BRANDEIS.BITNET@wiscvm.wisc.EDU
Newsgroups: comp.lang.c
Subject: *\"LDA\" ok?
Message-ID: <8877@brl-adm.ARPA>
Date: Wed, 19-Aug-87 23:55:11 EDT
Article-I.D.: brl-adm.8877
Posted: Wed Aug 19 23:55:11 1987
Date-Received: Sat, 22-Aug-87 06:30:32 EDT
Sender: news@brl-adm.ARPA
Lines: 27

I was trying to write a C program that would read MIX commands from
stdin. I also wanted to be able to verify that the string opcode
was actually internally equal to the string LDA in case the MIX
command was  LDA 2000,2(0:3)  <CR>. After some experimentation I
arrived at the following code. It works, but I am somewhat dismayed
by the expression (*opcode == *"LDA") . It just looks so peculiar.
Is it really OK?

#include <stdio.h>

main()
{
        char opcode[4];
        int  address, index, left, right ;

        printf("Type assembly language statement:\n\n");
        scanf("%s %d,%d(%d:%d)",opcode, &address, &index, &left, &right);
        printf("Opcode\t=%s\n",opcode);
        printf("Address\t=%d\n",address);
        printf("Index\t=%d\n",index);
        printf("Field\t= (%d:%d)\n",left,right);

        if (*opcode == *"LDA") printf("Gotcha!\n");
        else printf("No match...\n");
}

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