GOTO Considered Harmful

[code]
if ((err = SSLHashSHA1.update(&hashCtx, &serverRandom)) != 0)
goto fail;
if ((err = SSLHashSHA1.update(&hashCtx, &signedParams)) != 0)
goto fail;
goto fail;
if ((err = SSLHashSHA1.final(&hashCtx, &hashOut)) != 0)
goto fail;
.../[code]

Homework problem #456787656:

Write a Doubles Basic interpreter where code is doubles and the only expressible programs are programs that check doubles.