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22 lines
338 B
C
22 lines
338 B
C
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#include "stdio.h"
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#include "stdlib.h"
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#include "ctype.h"
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/*
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** atoi(s) - convert s to integer.
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*/
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int atoi(char *s)
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{
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int sign, n;
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while(isspace(*s)) ++s;
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sign = 1;
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switch(*s) {
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case '-': sign = -1;
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case '+': ++s;
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}
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n = 0;
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while(isdigit(*s)) n = 10 * n + *s++ - '0';
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return (sign * n);
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}
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