执行以下程序后，test.txt文件的内容是(若文件能正常打开)______。#includemain() 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* fseek(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