学生管理系统源码
1、注册
/*
注册主要逻辑
*/QString id = ui->line_id->text();
QString password = ui->line_password->text();
QString password2 = ui->line_password2->text();
if (id == nullptr) {
QMessageBox::warning(this, " ", "您的用户名为空！");
} else if (id.length() < 6) {
QMessageBox::warning(this, " ", "您的用户名小于六位！");
} else if (password == nullptr) {
QMessageBox::warning(this, " ", "您的密码为空！");
} else if (password.length() < 6) {
QMessageBox::warning(this, " ", "您的密码小于六位！");
} else if (password != password2) {
QMessageBox::warning(this, " ", "两次密码不一致！");
} else {
LinkList *P = R;
while (P->next != nullptr) {
if (P->next->Id == id) {
QMessageBox::warning(this, " ", "存在当前用户名");
return;
}
P = P->next;
}
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