筆試題（main 主函數(shù)）
main 主函數(shù)執(zhí)行完畢后，是否可能會再執(zhí)行一段代碼，給出說明？
答案：可以，可以用_onexit 注冊一個函數(shù)，它會在main 之后執(zhí)行int fn1(void), fn2(void), fn3(void), fn4 (void);
void main( void )
{
String str("zhanglin");
_onexit( fn1 );
_onexit( fn2 );
_onexit( fn3 );
_onexit( fn4 );
printf( "This is executed first.\n" );
}
int fn1()
{
printf( "next.\n" );
return 0;
}
int fn2()
{
printf( "executed " );
return 0;
}
int fn3()
{
printf( "is " );
return 0;
}
int fn4()
{
printf( "This " );
return 0;
}
The _onexit function is passed the address of a function (func) to be called when the program terminates normally. Successive calls to _onexit create a register of functions that are executed in LIFO (last-in-first-out) order. The functions passed to _onexit cannot take parameters.
【筆試題（main 主函數(shù)）】相關(guān)文章：
main 主函數(shù)執(zhí)行完畢后，是否可能會再執(zhí)行一段代碼11-24
Java main方法面試題及答案09-17
Java main方法經(jīng)典面試題及答案09-16
360筆試題目10-20
華為2017筆試題08-16
華為2017筆試試題08-10
桂林銀行筆試題筆經(jīng)10-21
Java中的main()方法詳解201608-07
三角函數(shù)測試題及答案08-16