更多"执行语句序列 ofstream outfile('data.dat'"的相关试题:
[单项选择]执行语句序列
ofstream outfile("data.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“...”处的表达是 ( )。
A. outfile.fail() 或 outfile
B. outfile.good()或!outfile
C. outfile.good()或 outfile
D. outfile.fail()或!outfile
[单项选择]执行语句序列
ofstream outfile("DATA.DAT");
if(…)cout<<"OK";elsec out<<"FAIL";
后,如果文件打开成功显示"OK",否则就显示"FAIL"。由此可知,上面if语句的…处的表达式应是【 】
A. outfile.fail()或 outfile
B. outfile.good()或 !outfile
C. outfile.good()或 outfile
D. outfile.fail()或 !outfile
[单项选择]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. outfilfail( )或outfile
B. outfilgood( )或outfile
C. outfilgood( )或!outfile
D. outfilfail( )或!out file
[单项选择]
执行语句序列
ofstream outfile("DATA.DAT");
if(…) cout << "OK";elsec out << "FAIL";
后,如果文件打开成功显示"OK",否则就显示"FAIL"。由此可知,上面if语句的…处的表达式应是()。
A. outfile.fail()或 outfile
B. outfile.good()或 !outfile
C. outfile.good()或 outfile
D. outfile.fail()或 !outfile
[单项选择]执行语句序列 ofstream outfile("datA.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语句的“…”处的表达式是( )。
A. outfilfail()或outfile
B. outfilgood()或!outfile
C. outfilgood()或outfile
D. outfilfail()或!outfile
[单项选择]执行语句序列 ofstream outfile("DATA.DAT"); if(...)cout<<"OK";else cout<<"FAIL"; 后,如果文件打开成功显示"OK",否则就显示"FAIL"。由此可知,上面if语句的…处的表达式应是
A. outfilfail()或outfile
B. outfilgood()或!outfile
C. outfilgood()或outfile
D. outfilfail()或!outfile
[单项选择]执行语句序列 ofstream outfile("data.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语句的“...”处的表达式是( )。
A. outfilfail()或outffle
B. outfilgood()或!outfile
C. outfilgood()或outfile
D. outfilfail()或!outfile
[单项选择]执行语句序列 ofstream outfile ("DATA. DAT"); if(...)cout <<"OK";else cout <<"FAIL";后,如果文件打开成功,显示"OK",否则就显示"FAIL"。由此可知,上面if语句的...处的表达式应是______ 。
A. outfilfail ()或outfile
B. outfil good() 或outfile
C. outfilgood ()或!outfile
D. outfilfail()或!outfile
[单项选择]执行下列语句序列后, ofstream outfile("DATA.DATA") if(…)cout<<"OK";else cout<<"FAIL";如果文件打开成功显示OK,否则就显示FAIL。由此可知,…处的表达式应是( )。
A. outfilfail()或outfile
B. outfilfail()或! outfile
C. outfilgood()或outfile
D. outfilgoodl()或! outfile
[单项选择]执行语句序列
intn:
cin>>n:
switch(n)
{ casel:
case2:cout<<''1'':
case 3:
case4:cout<<''2'': break:
delhult:cout<<''3'':
}
时,若键盘输入1,则屏幕显示【 】
A. 1
B. 2
C. 3
D. 12