为全面提高对外开放水平，我们应（）

请补充main 函数，该函数的功能是：把文本文件B中的内容追加到文本文件A的内容之后。 例如，文佃的内容为“I’m ten.”，文件A的内容为“I’ m a student!”，追加之后文件A的内容为“I’m a student !I’m ten.” 注意：部分源程序给出如下。 请勿改动主函数main 和其他函数中的任何内容，仅在函数main 的横线上填入所编写的若干表达式或语句。 试题程序： include＜stdio, h＞ include＜conio. h＞ define N 80 main() { FILE *fp, * fp1, *fp2; int i; char c[N] ,t, ch; clrscr (); if ((fp=fopen ('A. dat ', 'r') ) == NULL) { printf ('file A cannot be opened n'); exit (0); } printf(' n A contents are : n n'); for (i=0; (ch=fgetc (fp)) !=EOF; i++) { C [i]=ch; putchar (c [i]); fclose (fp); if((fp=fopen ('B. dat', 'r') )==NULL) { printf ('file B cannot be opened n'); exit (0); } printf(' n n nB contents are : n n'); for (i=0; (ch=fgetc (fp)) !=EOF; i++) { c [i] =ch; putchar (c [i]); } fclose (fp); if ( (fp1=fopen ('A.dat' ,'a'))【 】(fp2 =fopen ('B. dat', 'r') ) ) { while ( (ch=fgetc (fp2)) !=EOF)【 】; } else { printf('Can not open A B ! n'); } fclose (fp2); fclose (fp1); printf (' n***new A contents*** n n'); if ( ( fp=fopen ('A. dar', 'r') )==NULL) { printf ('file A cannot be opened n'); exit (0); } for (i=0; (ch=fgetc (fp)) !=EOF;i++) { c [i] =ch; putchar (c [i] ); }【 】; } 点击查看答案

Practise answering these questions. What kinds of work are most popular in your home town? Which aspect of your work studies do you enjoy most? What are you planning to do next in your career? Do you use computers much in your work studies? What changes in business do you expect will happen in the future? 点击查看答案