例91从键盘输入字符,逐# include< stdio . h 存到磁盘文件中,直到mi 输入“#“为止 FILE *fp #include <stdio.h> main( i FILE * fp 例13.1 char ch, filename=out. tYt2% NULL if(fp=fopen(filename, r== i printf("cannot open filen") exit(O) 例读文本文件内容, while((ch=fgetc(p))=EOF) 并显示 putchar(ch fclose(fp) 判断文本文件是否结東 fclose(fp)例 9.1从键盘输入字符，逐个 存到磁盘文件中，直到 输入‘#“为止 #include <stdio.h> main() { FILE *fp; char ch,*filename=“out.txt”; if((fp=fopen(filename,"w"))==NULL) { printf("cannot open file\n"); exit(0); } printf("Please input string:"); ch=getchar(); while(ch!='#') { fputc(ch,fp); putchar(ch); ch=getchar(); } fclose(fp); } 例 读文本文件内容， 并显示 #include <stdio.h> main() { FILE *fp; char ch,*filename=“out.txt”; if((fp=fopen(filename,”r"))==NULL) { printf("cannot open file\n"); exit(0); } while((ch=fgetc(fp))!=EOF) putchar(ch); fclose(fp); } 判断文本文件是否结束 例13.1