added CodeBlocks Project

current state: menu, insert category, show categories
2017-03-18 00:27:05 +01:00
parent 50a5ee31c5
commit 2ba7cb25ee
8 changed files with 331 additions and 0 deletions
--- a/project/dbclient.pgc
+++ b/project/dbclient.pgc
@@ -0,0 +1,102 @@
+#include <iostream>
+#include <stdlib.h>
+
+using namespace std;
+
+void initdb();
+void insertCategory();
+void menuInsert();
+void select();
+void cinClear();
+
+int main()
+{
+	initdb();
+
+	char choice;
+	int exit = 0;
+	for(;!exit;){
+        choice = 0;
+        cout << endl << endl << endl << "Was wollen Sie tun?:" << endl;
+        cout << "(e): Daten eingeben" << endl;
+        cout << "(a): Daten anzeigen" << endl;
+        cout << "" << endl;
+        cout << "(s): schliessen" << endl;
+        cin >> choice;
+        switch(choice){
+            case 'e':
+                insertCategory();
+                break;
+            case 'a':
+                select();
+                break;
+            case 's':
+                exit = 1;
+                break;
+        }
+    }
+}
+
+void initdb(){
+    EXEC SQL CONNECT TO "CSDB@lamp.wlan.hwr-berlin.de" USER gr2 IDENTIFIED BY "2Au-R2n-cQN-uuG";
+        cout << "state: " << sqlca.sqlstate << endl;
+	EXEC SQL COMMIT;
+}
+
+void menuInsert(){
+    insertCategory();
+}
+
+void insertCategory(){
+    EXEC SQL BEGIN DECLARE SECTION;
+		char eingna[51];
+	EXEC SQL END DECLARE SECTION;
+
+    cout << "Eingabe Name: ";
+    cin >> eingna;
+    if (!cin) cinClear();
+
+    if (eingna)
+    {
+        EXEC SQL INSERT INTO gr2.test(name) VALUES (:eingna);
+        if (!strcmp(sqlca.sqlstate, "23505")) cout << "GIBT'S SCHON" << endl;
+        cout << "state: " << sqlca.sqlstate << endl;
+        EXEC SQL COMMIT;
+    }
+}
+
+void select(){
+    //Die Ausgabe funktioniert nur dann korrekt, wenn die ids eindeutig sind!!!
+    EXEC SQL BEGIN DECLARE SECTION;
+        int id;
+        char name[51];
+    EXEC SQL END DECLARE SECTION;
+
+    cout << endl << "Ausgabe Tabelle: " << endl;
+
+	EXEC SQL DECLARE xxx CURSOR FOR SELECT "ID",name FROM gr2.test ORDER BY "ID";
+	EXEC SQL OPEN xxx;
+
+    int residl;
+	residl = id;
+
+    EXEC SQL FETCH FIRST FROM xxx INTO :id, :name;
+	if(!strcmp(sqlca.sqlstate, "00000")) cout << id << " " << name << endl;
+	else if(!strcmp(sqlca.sqlstate, "02000")) cout << "Die Tabelle ist leer!";
+
+	while(id != residl)
+	{
+		residl = id;
+		EXEC SQL FETCH NEXT FROM xxx INTO :id, :name;
+		if(!strcmp(sqlca.sqlstate, "00000")) cout << id << " " << name << endl;
+	}
+	EXEC SQL COMMIT;
+}
+
+void cinClear() {
+	char Muell;
+	cin.clear();
+	do {
+		cin.get(Muell);
+	} while (Muell != '\n');
+}