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/*
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 * pANS stdio -- fgets
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 */
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#include "iolib.h"
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char *fgets(char *as, int n, FILE *f){
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	int c=0;
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	char *s=as;
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	while(n>1 && (c=getc(f))!=EOF){
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		*s++=c;
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		--n;
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		if(c=='\n') break;
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	}
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	if(c==EOF && s==as
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	|| ferror(f)) return NULL;
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	if(n) *s='\0';
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	return as;
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}