例:把字符ch的值输出到fp所指向的文件中 #立 nclude“ stdio.h” main FILE *fp char ch if((fp= fopen(“file1.txt”,"”w”)=NUL) printf(“ Cannot open this file\n”); exit(o; j else while((ch=getchar o)!=\n') fputc(ch, fp); fclose (fp)#include “stdio.h” main() { FILE *fp; char ch; if((fp=fopen(“file1.txt” , ”w”))==NULL) { printf(“Cannot open this File\n”); exit(0); } else while((ch=getchar())!=’\n’) fputc(ch,fp); fclose(fp); } 例：把字符ch的值输出到fp所指向的文件中