atol.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 50 行

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1.1
date	97.09.21.19.27.40;	author dls;	state Dist;
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@pre-3e code
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@long
atol(p)
register char *p;
{
	long n;
	register int f;

	n = 0;
	f = 0;
	for(;;p++) {
		switch(*p) {
		case ' ':
		case '\t':
			continue;
		case '-':
			f++;
		case '+':
			p++;
		}
		break;
	}
	while(*p >= '0' && *p <= '9')
		n = n*10 + *p++ - '0';
	return(f? -n: n);
}
@