执行语句序列 ofstream outfile(“DATE.DAT”); if(…)cout<<"OK"; else cout<<"FAIL"后,如果文件打
执行语句序列
ofstream outfile(“DATE.DAT”);
if(…)cout<<"OK"; else cout<<"FAIL"后,如果文件打开成功,显示“OK”,否则显示"FAIL"。由此可知,上面if语句…处的表达式是:
A.outfile.fail()或outfile
B.outfile.good()或outfile
C.outfile.good()或!outfile
D.outfile.fail()或!out file