#include <stdio.h>
#include <process.h>
void main(){
FILE *fp;
char filename[30],str[50];
printf("please input filename:\n");
scanf("%s",filename);
if((fp=fopen(filename,"wb"))==NULL){
printf("can not open!\npress any key to continue\n");
getchar();
exit(0);
}
printf("please input string:\n");
getchar();
gets(str);
fputs(str,fp);
fclose(fp);
if((fp=fopen(filename,"rb"))==NULL){
printf("can not open!\npress any key to continue\n");
getchar();
exit(0);
}
fseek(fp,4L,0);
fgets(str,sizeof(str),fp);
putchar('\n');
puts(str);
fclose(fp);
}
