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Quellcode

//do_while1.cpp
#include <iostream>
using namespace std;

int main(void) {
	int var;
	do {
		cout << "-1- Europa\n";
		cout << "-2- Asian\n";
		cout << "-3- Afrika\n";
		cout << "-4- Amerika\n";
		cout << "-5- Ende\n";
		cout << "Ihre Wahl bitte: ";
		if ( !(cin >> var) ) {
			cerr << "Falsche eingabe - Keine Zahl\n";
			exit(1);
		}
		cout << "Ihre Wahl ist ";
		switch ( var ) {
			case 1:
				cout << "Europa\n";
				break;
			case 2:
				cout << "Asien\n";
				break;
			case 3:
				cout << "Afrika\n";
				break;
			case 4:
				cout << "Amerika\n";
				break;
			case 5:
				cout << "\nOk, das Programm wird beendet!\n";
				break;
			default:
				cout << "\nFehler bei der Auswahl !\n";
		}
	} while( var != 6 );
	return 0;
}

Quellcode

g++ -Wall -o do_while1 do_while1.cpp

Quellcode

do_while1.cpp: In function ‘int main()’:
do_while1.cpp:16: error: ‘exit’ was not declared in this scope

Quellcode

g++ (Ubuntu 4.3.2-1ubuntu12) 4.3.2
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Quellcode

Qt: 3.3.8b
KDE: 3.5.10
KDevelop: 3.5.3

Quellcode

//for2.cpp
#include <iostream>
using namespace std;

int main(void) {
	for ( int n1=1, n2=2; n1 <= 10; n1++; n2*=2 ) {
		cout << (n1*n2) << '\n';
	}
	return 0;
}

Quellcode

for2.cpp: In function ‘int main()’:
for2.cpp:6: error: expected `)' before ‘;’ token
for2.cpp:6: warning: unused variable ‘n2’
for2.cpp:6: error: name lookup of ‘n2’ changed for new ISO ‘for’ scoping
for2.cpp:6: error:   using obsolete binding at ‘n2’
for2.cpp:6: error: expected `;' before ‘)’ token