一个超简单的FIFO在QT里验证了

用下标操作的环形 FIFOunsigned int rdex=0; unsigned int wdex=0; #define rwmax 10 void MainWindow::on_PutMessage_clicked() { QString debugstring("Write@"); if(((wdex+1)%rwmax)==rdex)//满 { // debugstring=debugstring+" None"; }else { wdex++; if(wdex>=rwmax)wdex=0; unsign ed char ysdex=0;//原来的下标 debugstring=debugstring+"["+QString::number((wdex>0)?(wdex-1):(rwmax-1))+"] +1--> "+QString::number(wdex); } //if(wdex>=rwmax)wdex=0; ui->tEdit->append(debugstring); } void MainWindow::on_SendMessage_clicked() { QString debugstring("Read @"); if(rdex!=wdex)//不空 { rdex++; if(rdex>=rwmax)rdex=0; debugstring=debugstring+"["+QString::number((rdex>0)?(rdex-1):(rwmax-1))+"] +1--> "+QString::number(rdex); }else { // debugstring=debugstring+" None"; } ui->tEdit->append(debugstring); //if(rdex>=rwmax)rdex=0; } ed char ysdex=0;//原来的下标 debugstring=debugstring+"["+QString::number((wdex>0)?(wdex-1):(rwmax-1))+"] +1--> "+QString::number(wdex); } //if(wdex>=rwmax)wdex=0; ui->tEdit->append(debugstring); } void MainWindow::on_SendMessage_clicked() { QString debugstring("Read @"); if(rdex!=wdex)//不空 { rdex++; if(rdex>=rwmax)rdex=0; debugstring=debugstring+"["+QString::number((rdex>0)?(rdex-1):(rwmax-1))+"] +1--> "+QString::number(rdex); }else { // debugstring=debugstring+" None"; } ui->tEdit->append(debugstring); //if(rdex>=rwmax)rdex=0; }