51 lines
658 B
C
51 lines
658 B
C
/*
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FUNCTION
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<<strlwr>>---force string to lowercase
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INDEX
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strlwr
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ANSI_SYNOPSIS
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#include <string.h>
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char *strlwr(char *<[a]>);
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TRAD_SYNOPSIS
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#include <string.h>
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char *strlwr(<[a]>)
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char *<[a]>;
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DESCRIPTION
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<<strlwr>> converts each character in the string at <[a]> to
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lowercase.
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RETURNS
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<<strlwr>> returns its argument, <[a]>.
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PORTABILITY
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<<strlwr>> is not widely portable.
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<<strlwr>> requires no supporting OS subroutines.
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QUICKREF
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strlwr
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*/
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#include <string.h>
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#include <ctype.h>
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char *
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strlwr (a)
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char *a;
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{
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char *ret = a;
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while (*a != '\0')
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{
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if (isupper (*a))
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*a = tolower (*a);
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++a;
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}
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return ret;
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}
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