执行以下程序后，test.txt文件的内容是（若文件能正常打开）______。#include main(){ FILE *fp;char *s1= Fortran ,*s2= Basic ;if((fp=fopen( test.txt , wb ))==NULL){ printf( Can’’t open test.txt file n ); exit(1);}fwrite(s1,7,1,fp); *把从地址s1开始的7个字符写到fp所指文件中* f seek(fp, 0L,SEEK_SET); *文件位置指针移到文件开头* fwrite(s2,5,1,fp);fclose(fp);}
A．Basican
B．BasicFortran
C．Basic
D．FortranBasic