ͻ񻣼
void MainWindow::on_actionSave_Document_triggered() { QString fileName = QFileDialog::getSaveFileName(this, "Save document...", qApp->applicationDirPa ÔĶÁÈ«ÎÄ
2021Äê8ÔÂ15ÈÕ
ͻ񻣼
//»ñÈ¡±£´æ·¾¶ QString savepath = QFileDialog::getSaveFileName(this); //´´½¨Îļþ¶ÔÏó QFile file(savepath); if(!file.open(QIODevice::ReadWrite)) //¶Áд·½Ê½´ò¿ª { ui->sta ÔĶÁÈ«ÎÄ
2021Äê8ÔÂ14ÈÕ
ͻ񻣼
QDateTime dateTime = QDateTime::currentDateTime(); // ×Ö·û´®¸ñʽ»¯ QString timestamp = dateTime.toString("yyyy-MM-dd hh:mm:ss.zzz"); // »ñÈ¡ºÁÃëÖµ int ms = dateT ÔĶÁÈ«ÎÄ
2021Äê8ÔÂ13ÈÕ
ͻ񻣼
½«icoÎļþÌí¼Óµ½ÏîÄ¿Îļþ¼ÐÖУ¬ÀýÈ磺logo.ico ÔÚ.proÎļþÖмÓÈëÒÔÏÂÓï¾ä RC_ICONS = logo.ico ÔĶÁÈ«ÎÄ
ͻ񻣼
#include <iostream> using namespace std; int main(){ int a, b; bool flag; //¶¨Òå²¼¶û±äÁ¿ cin>>a>>b; flag = a > b; cout<<"flag = "<<flag<<endl; return 0; } C ÔĶÁÈ«ÎÄ
2021Äê8ÔÂ7ÈÕ
ͻ񻣼
·Ò룺 ÔĶÁÈ«ÎÄ
ͻ񻣼
µÚÒ»²½£ºQt Óõ½ÄÄÒ»ÏÄÜ£¬ÐèÒªÔÚ ".pro" ÖÐµÄ "QT += " ºóÃ潫¸Ã¹¦ÄܶÔÓ¦µÄÀàµÄÃû×ÖдÉÏ£»ÀýÈç QT += serialport µÚ¶þ²½£ºÔÚ¡°.h¡±ÎļþÖмÓÈë±ØÒªµÄÍ·Îļþ£»ÀýÈç #include <QSerialPort> µÚÈý²½£º²ÛslotsµÄÉùÃ÷£¬ÕâÒ»²½Ò²ÊÇÔÚ¡°.h¡±ÎļþÖÐд£» ÔĶÁÈ«ÎÄ
2021Äê8ÔÂ5ÈÕ
ͻ񻣼
ÊäÈëÊä³ö ÊäÈ룺cin Êä³ö£ºcout endl µÄ×÷ÓÃÊÇ»»ÐÐ Í·Îļþ ÔÚC++ÖУ¬Í·Îļþ²»ÔÙÒÔ.h½á⣬±äΪȥµô.h£¬²¢ÔÚ¿ªÍ·Ôö¼Ó×Ö·ûc ÀýÈ磺 #include <cstdio> Ç¿ÖÆÀàÐÍת»»ÔËËã·û ÀàÐÍÃû£¨´ýת»»µÄ±í´ïʽ£© ÀýÈ磺 int (3.5) ¡¢double(2) ¿´ÆðÀ´¸üÏñÊǺ¯Êýµ÷Óà ÔĶÁÈ«ÎÄ
ͻ񻣼
ÄÚÁªº¯Êý£º º¯Êýµ÷ÓÃÊÇÓÐʱ¼ä¿ªÏúµÄ¡£Èç¹ûº¯Êý±¾ÉíÖ»Óм¸ÌõÓï¾ä£¬Ö´Ðзdz£¿ì£¬¶øÇÒº¯Êý±»·´¸´Ö´Ðкܶà´Î£¬Ïà±È֮ϵ÷Óú¯ÊýËù²úÉúµÄÕâ¸ö¿ªÏú¾Í»áÏÔµÃ±È½Ï´ó¡£ ÎªÁ˼õÉÙº¯Êýµ÷ÓõĿªÏú£¬ÒýÈëÁËÄÚÁªº¯Êý»úÖÆ¡£±àÒëÆ÷´¦Àí¶ÔÄÚÁªº¯ÊýµÄµ÷ÓÃÓï¾äʱ£¬Êǽ«Õû¸öº¯ÊýµÄ´úÂë²åÈëµ½µ÷ÓÃÓï¾ä´¦£¬¶ø²»»á²úÉúµ÷Óú¯ÊýµÄÓï¾ä¡£ ÔÚº¯Êý¶¨ ÔĶÁÈ«ÎÄ
ͻ񻣼
Ò». ÔÚC++ÖУ¬ÓÃnewÔËËã·ûʵÏÖ¶¯Ì¬ÄÚ´æ·ÖÅä ÓÐÁ½ÖÖÓ÷¨£º µÚa56爆大奖在线娱乐Ó÷¨£¬·ÖÅäÒ»¸ö±äÁ¿ P = new T ; PÊÇÒ»¸öÖ¸Õ룬²¢ÇÒÊÇÀàÐÍΪT*µÄÖ¸Õ룬TÊÇÈa56爆大奖在线娱乐âÀàÐÍÃû ¶¯Ì¬·ÖÅä³öһƬ´óСΪ sizeof(T) ×Ö½ÚµÄÄÚ´æ¿Õ¼ä£¬²¢ÇÒ½«¸ÃÄÚ´æ¿Õ¼äµÄÆðʼµØÖ·¸³Öµ¸øP¡£ ÀýÈ磺 int *pn; pn = ÔĶÁÈ«ÎÄ