Weitere Beispielprogramme 12.11.2020, Aktualisierung der Praktikumsunterlagen zu Versuch 1

20201112/functions-1.c

+#include <stdio.h>
+
+void add_verbose (int a, int b)
+{
+  printf ("%d + %d = %d\n", a, b, a + b);
+}
+
+int main (void)
+{
+  add_verbose (3, 7);
+  return 0;
+}

20201112/functions-10.c

+#include <stdio.h>
+
+int a, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-11.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-12.c

+#include <stdio.h>
+
+/*
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+*/
+
+int main (void)
+{
+  int a, b = 3;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-13.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+/*
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-14.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-15.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  a++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-16.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-17.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = 12;
+  b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+/*
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-18.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+/*
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-19.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+void bar (void)
+{
+  static int a = 42;
+  printf ("bar(): " "a = %d, b = %d\n", a, b);
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  bar ();
+/*
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+*/
+  return 0;
+}

20201112/functions-2.c

+#include <stdio.h>
+
+void add_verbose (int a, int b)
+{
+  printf ("%d + %d = %d\n", a, b, a + b);
+}
+
+int main (void)
+{
+  int a = add_verbose (3, 7);
+  return 0;
+}

20201112/functions-20.c

+#include <stdio.h>
+
+int a = 0, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  return 0;
+}

20201112/functions-21.c

+#include <stdio.h>
+
+int a, b = 3;
+
+void foo (void)
+{
+  b++;
+  static int a = 5;
+  int b = 7;
+  printf ("foo(): " "a = %d, b = %d\n", a, b);
+  a++;
+}
+
+int main (void)
+{
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  a = b = 12;
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  foo ();
+  printf ("main(): " "a = %d, b = %d\n", a, b);
+  return 0;
+}

20201112/functions-3.c

+#include <stdio.h>
+
+void add_verbose (int a, int b)
+{
+  printf ("%d + %d = %d\n", a, b, a + b);
+}
+
+int main (void)
+{
+  void a = add_verbose (3, 7);
+  return 0;
+}

20201112/functions-4.c

+#include <stdio.h>
+
+void print_hello (void)
+{
+  printf ("Hello, world!\n");
+}
+
+int main (void)
+{
+  print_hello ();
+  print_hello ();
+  return 0;
+}

20201112/functions-5.c

+#include <stdio.h>
+
+int print_hello (void)
+{
+  printf ("Hello, world!\n");
+  return 42;
+}
+
+int main (void)
+{
+  print_hello ();
+  print_hello ();
+  return 0;
+}

20201112/functions-6.c

+#include <stdio.h>
+
+int print_hello (void)
+{
+  printf ("Hello, world!\n");
+  return 42;
+}
+
+void main (void)
+{
+  print_hello ();
+  print_hello ();
+}

20201112/functions-7.c

+#include <stdio.h>
+
+int print_hello (void)
+{
+  printf ("Hello, world!\n");
+  return 42;
+}
+
+int main (void)
+{
+  print_hello ();
+  print_hello ();
+  return 42;
+}

20201112/functions-7.txt

+#include <stdio.h>
+
+int print_hello (void)
+{
+  printf ("Hello, world!\n");
+  return 42;
+}
+
+int main (void)
+{
+  print_hello ();
+  print_hello ();
+  return 42;
+}
+cassini/home/peter/bo/2020ws/hp/20201112> gcc -Wall -O functions-7.c -o functions-7           cassini/home/peter/bo/2020ws/hp/20201112> if ./functions-7; then echo "Hat geklappt."; else echo "Hat nicht geklappt."; fi
+Hello, world!
+Hello, world!
+Hat nicht geklappt.
+cassini/home/peter/bo/2020ws/hp/20201112> echo $?
+0
+cassini/home/peter/bo/2020ws/hp/20201112> ./functions-7
+Hello, world!
+Hello, world!
+cassini/home/peter/bo/2020ws/hp/20201112> echo $?
+42
+cassini/home/peter/bo/2020ws/hp/20201112> ./functions-6
+Hello, world!
+Hello, world!
+cassini/home/peter/bo/2020ws/hp/20201112> echo $?
+42
+cassini/home/peter/bo/2020ws/hp/20201112> ./functions-5
+Hello, world!
+Hello, world!
+cassini/home/peter/bo/2020ws/hp/20201112> echo $?
+0
+cassini/home/peter/bo/2020ws/hp/20201112>