问题:[选择题]
[单项选择题] 有以下程序: #include <stdio.h> void WriteStr(char *fn,char *str) FILE *fp; fp=fopen(fn,"a"); fputs(str,fp);fclose(fp); main() WriteStr("t1.dat","start"); WriteStr("t1.dat","end"); 程序运行后,文件t1
A.start
B.end
C.startend
D.endrt