21 lines
316 B
C
21 lines
316 B
C
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atoi(s)
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register char *s;
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{
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register int total = 0;
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register unsigned digit;
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int minus = 0;
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while (*s == ' ' || *s == '\t')
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s++;
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if (*s == '+') s++;
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else if (*s == '-') {
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s++;
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minus = 1;
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}
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while ((digit = *s++ - '0') < 10) {
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total *= 10;
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total += digit;
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}
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return(minus ? -total : total);
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}
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