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发表于 2006-7-10 15:08:19
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显示全部楼层
[code:1]#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define DATASIZE 10
typedef struct stringdata
{
char *string;
int iscontinuing;
struct stringdata *next;
} mydata;
mydata *append(mydata *start, char *input);
void displaydata(mydata *start);
void freedata(mydata *start);
int main(void)
{
char input[DATASIZE];
mydata *start=NULL;
printf("ENTER SOME DATA,AND PRESS Ctrl+D WHEN DONE. \n");
while(fgets(input, sizeof(input), stdin))
{
start=append(start, input);
}
displaydata(start);
freedata(start);
return 0;
}
mydata *append(mydata *start, char *input)
{
mydata *cur=start, *prev=NULL, *new;
while(cur)
{
prev=cur;
cur=cur->next;
}
cur=prev;
new=malloc(sizeof(mydata));
if(!new)
{
printf("COULDN’T ALLOCATE MEMORY! \n");
exit(255);
}
if(cur)
cur->next=new;
else
start=new;
cur=new;
if(!(cur->string=malloc(sizeof(input)+1)))
{
printf("ERROR ALLOCATING MEMORY! \n");
exit(255);
}
strcpy(cur->string, input);
cur->iscontinuing=!(input[strlen(input)-1]=='\n'||input[strlen(input)-1]=='\r');
cur->next=NULL;
return start;
}
void displaydata(mydata *start)
{
mydata *cur;
int linecounter=0, structcounter=0;
int newline=1;
cur=start;
while(cur)
{
if(newline)
printf("LINE %d:",++linecounter);
structcounter++;
printf("%s",cur->string);
newline=!cur->iscontinuing;
cur=cur->next;
}
printf("THIS DATA CONTAINED %d LINES AND WAS STORED IN %d STRUCTS. \n",
linecounter,structcounter);
}
void freedata(mydata *start)
{
mydata *cur, *next=NULL;
cur=start;
while(cur)
{
next=cur->next;
free(cur->string);
free(cur);
cur=next;
}
}
[/code:1] |
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