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#include <stdio.h>
#include <stdlib.h>
#define MAX 40
int main(void)
{
FILE *fp;
char words[MAX];
char ch ;
int len ;
if ((fp = fopen("wordy", "a+")) == NULL)
{
fprintf(stdout,"Can't open \"words\" file.\n");
exit(1);
}
puts("Enter words to add to the file; press the Enter");
puts("key at the beginning of a line to terminate.");
while (gets(words) != NULL && words[0] != '\0')
{
fprintf(fp, "%s ", words);
}
puts("File contents:");
rewind(fp);
while (fscanf(fp,"%s",words) == 1)
{
puts(words);
}
if (fclose(fp) != 0)
fprintf(stderr,"Error closing file\n");
return 0;
}
hile (gets(words) != NULL && words[0] != '\0')
因为gets的原因,这是一个很危险的库函数了,尽量使用fgets吧