:edited for code tags:Code:#include <stdio.h> #include <stslib.h> int main (void){ char ch[20]; FILE *fp; if ((fp=fopen("./test.txt","w+"))==NULL) { fprintf(stderr,"cant open the fil!\n"); exit(1); } fprintf(fp,"text\n text\n"); while (ch != EOF) { fgets(ch,sizeof(ch),fp); fprintf(stderr,"%s",ch); }