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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_09_03
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9n03116a
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1991-01-15
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861b
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46 lines
/*
* xr.c - a cross-reference generator
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct listnode listnode;
struct listnode
{
unsigned number;
listnode *next;
};
typedef struct treenode treenode;
struct treenode
{
char *word;
listnode *lines;
treenode *left, *right;
};
treenode *addtree(treenode *t, char *w, unsigned n);
void printtree(treenode *t);
int getword(char *word, size_t lim);
#define MAXWORD 100
int main(void)
{
treenode *root = NULL;
char word[MAXWORD];
unsigned lineno = 1;
while (getword(word, MAXWORD) != EOF)
if (isalpha(word[0]))
root = addtree(root, word, lineno);
else if (word[0] == '\n')
++lineno;
printtree(root);
return 0;
}