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<a name="l1"></a><span class=cF0>#</span><span class=cF1>define</span><span class=cF0> DB_FILENAME </span><span class=cF6>"~/DataBaseDemo.BIN"</span><span class=cF0>
<a name="l2"></a>#</span><span class=cF1>define</span><span class=cF0> DB_ACCT_MAX 100
<a name="l3"></a>#</span><span class=cF1>define</span><span class=cF0> DB_ACCT_BLKS 1
<a name="l4"></a>
<a name="l5"></a></span><span class=cF1>class</span><span class=cF0> Acct
<a name="l6"></a>{</span><span class=cF2>//Use <CTRL-l> to help generate formats.</span><span class=cF0>
<a name="l7"></a> </span><span class=cF1>U8</span><span class=cF0> name[32] format </span><span class=cF6>"$DA-P,LEN=32,A=\"Name:%s\"$\n"</span><span class=cF0>;
<a name="l8"></a> </span><span class=cF1>U8</span><span class=cF0> addr[64] format </span><span class=cF6>"$DA-P,LEN=64,A=\"Addr:%s\"$\n"</span><span class=cF0>;
<a name="l9"></a> </span><span class=cF1>U8</span><span class=cF0> pad[DB_ACCT_BLKS*</span><span class=cF3>BLK_SIZE</span><span class=cF0>-64-32];
<a name="l10"></a>};
<a name="l11"></a>
<a name="l12"></a></span><span class=cF1>U0</span><span class=cF0> InitDatabase()
<a name="l13"></a>{ </span><span class=cF2>//Write new contiguous file</span><span class=cF0>
<a name="l14"></a> </span><span class=cF9>CFile</span><span class=cF0> *f=</span><span class=cF5>FOpen</span><span class=cF0>(DB_FILENAME,</span><span class=cF6>"w"</span><span class=cF0>,DB_ACCT_MAX*DB_ACCT_BLKS);
<a name="l15"></a> </span><span class=cF5>FClose</span><span class=cF0>(f);
<a name="l16"></a>}
<a name="l17"></a>
<a name="l18"></a></span><span class=cF1>U0</span><span class=cF0> WriteAcct()
<a name="l19"></a>{
<a name="l20"></a> </span><span class=cF9>CFile</span><span class=cF0> *f;
<a name="l21"></a> Acct a;
<a name="l22"></a> </span><span class=cF9>I64</span><span class=cF0> acctnum;
<a name="l23"></a>
<a name="l24"></a> acctnum=</span><span class=cF5>GetI64</span><span class=cF0>(</span><span class=cF6>"Acct #"</span><span class=cF0>,-1);
<a name="l25"></a> </span><span class=cF1>if</span><span class=cF0> (0<=acctnum<DB_ACCT_MAX) </span><span class=cF7>{</span><span class=cF0>
<a name="l26"></a> </span><span class=cF5>MemSet</span><span class=cF0>(&a,0,</span><span class=cF3>BLK_SIZE</span><span class=cF0>);
<a name="l27"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>DocForm</span><span class=cF7>(</span><span class=cF0>&a</span><span class=cF7>)</span><span class=cF0>) {
<a name="l28"></a> f=</span><span class=cF5>FOpen</span><span class=cF0>(DB_FILENAME,</span><span class=cF6>"w+"</span><span class=cF0>);
<a name="l29"></a> </span><span class=cF5>FBlkWrite</span><span class=cF0>(f,&a,acctnum*DB_ACCT_BLKS,DB_ACCT_BLKS);
<a name="l30"></a> </span><span class=cF5>FClose</span><span class=cF0>(f);
<a name="l31"></a> }
<a name="l32"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l33"></a>}
<a name="l34"></a>
<a name="l35"></a></span><span class=cF1>U0</span><span class=cF0> ReadAcct()
<a name="l36"></a>{
<a name="l37"></a> </span><span class=cF9>CFile</span><span class=cF0> *f;
<a name="l38"></a> Acct a;
<a name="l39"></a> </span><span class=cF9>I64</span><span class=cF0> acctnum;
<a name="l40"></a>
<a name="l41"></a> acctnum=</span><span class=cF5>GetI64</span><span class=cF0>(</span><span class=cF6>"Acct #"</span><span class=cF0>,-1);
<a name="l42"></a> </span><span class=cF1>if</span><span class=cF0> (0<=acctnum<DB_ACCT_MAX) </span><span class=cF7>{</span><span class=cF0>
<a name="l43"></a> f=</span><span class=cF5>FOpen</span><span class=cF0>(DB_FILENAME,</span><span class=cF6>"r"</span><span class=cF0>);
<a name="l44"></a> </span><span class=cF5>FBlkRead</span><span class=cF0>(f,&a,acctnum*DB_ACCT_BLKS,DB_ACCT_BLKS);
<a name="l45"></a> </span><span class=cF5>FClose</span><span class=cF0>(f);
<a name="l46"></a> </span><span class=cF5>ClassRep</span><span class=cF0>(&a);
<a name="l47"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l48"></a>}
<a name="l49"></a>
<a name="l50"></a></span><span class=cF1>U0</span><span class=cF0> DatabaseDemo()
<a name="l51"></a>{
<a name="l52"></a> </span><span class=cF9>I64</span><span class=cF0> ch;
<a name="l53"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF5>FileFind</span><span class=cF7>(</span><span class=cF0>DB_FILENAME</span><span class=cF7>)</span><span class=cF0>)
<a name="l54"></a> InitDatabase;
<a name="l55"></a> </span><span class=cF1>do</span><span class=cF0> </span><span class=cF7>{</span><span class=cF0>
<a name="l56"></a> </span><span class=cF6>"$GREEN$R$FG$ead acct, $GREEN$W$FG$rite acct or $GREEN$<SHIFT-ESC>$FG$:"</span><span class=cF0>;
<a name="l57"></a> ch=</span><span class=cF5>ToUpper</span><span class=cF0>(</span><span class=cF5>GetChar</span><span class=cF0>);
<a name="l58"></a> </span><span class=cF6>'\n'</span><span class=cF0>;
<a name="l59"></a> </span><span class=cF1>if</span><span class=cF0> (ch==</span><span class=cF6>'R'</span><span class=cF0>) ReadAcct;
<a name="l60"></a> </span><span class=cF1>if</span><span class=cF0> (ch==</span><span class=cF6>'W'</span><span class=cF0>) WriteAcct;
<a name="l61"></a> </span><span class=cF7>}</span><span class=cF0> </span><span class=cF1>while</span><span class=cF0> (ch!=</span><span class=cF3>CH_SHIFT_ESC</span><span class=cF0> && ch!=</span><span class=cF3>CH_ESC</span><span class=cF0>);
<a name="l62"></a>}
<a name="l63"></a>
<a name="l64"></a>DatabaseDemo;
</span></pre></body>
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