• 2022-06-27
    以读写方式打开一个已有的文本文件file1,并且FILEfp,下面fopen函数正确的调用方式是()
    A: fp=fopen("file1","r")
    B: fp=fopen("file1","r+")
    C: fp=fopen("file1","a")
    D: fp=fopen("file1","w")