C Tutorial/stdio.h/fgets — различия между версиями
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Текущая версия на 10:32, 25 мая 2010
fgets
Item Value Header
- include <stdio.h>
Declaration char *fgets(char *str, int num, FILE *stream); Function reads up to num-1 characters from stream and stores them in *str. Return returns str on success or a NULL pointer on failure
Characters are read until either a newline or an EOF is received or until the specified limit is reached.
You should use feof() or ferror() to determine what has actually happened.
Use fgets() to display the contents of the text file.
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
FILE *fp;
char str[128];
if((fp=fopen("test", "r"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
while(!feof(fp)) {
if(fgets(str, 126, fp)) printf("%s", str);
}
fclose(fp);
return 0;
}