From 7d6e8e62cbc5b9cc24b43e06df306d5373d701c4 Mon Sep 17 00:00:00 2001
From: Ivan Mahonin <bh@icystar.com>
Date: Jan 19 2019 06:32:37 +0000
Subject: c: console


---

diff --git a/c/console/average/average.c b/c/console/average/average.c
new file mode 100644
index 0000000..db431f2
--- /dev/null
+++ b/c/console/average/average.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main() {
+  int h[10];
+  for(int i = 0; i < 10; ++i) {
+    printf("Enter height %d: ", i+1);
+    scanf("%d", &h[i]);
+  }
+
+  int sum = 0;
+  for(int i = 0; i < 10; ++i)
+    sum += h[i];
+  float avg = sum / 10.f;
+
+  printf("Average height is %f\n", avg);
+  return 0;
+}
diff --git a/c/console/box-and-hole/boxandhole.c b/c/console/box-and-hole/boxandhole.c
new file mode 100644
index 0000000..00a8aab
--- /dev/null
+++ b/c/console/box-and-hole/boxandhole.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+int main() {
+  int a, b, c;
+  printf("Enter box size (a b c): ");
+  scanf("%d%d%d", &a, &b, &c);
+
+  int x, y;
+  printf("Enter hole size (x y):");
+  scanf("%d%d", &x, &y);
+
+  int pass = 0;
+  if (a < x && b < y) pass = 1;
+  if (b < x && c < y) pass = 1;
+  if (c < x && a < y) pass = 1;
+
+  if (b < x && a < y) pass = 1;
+  if (c < x && b < y) pass = 1;
+  if (a < x && c < y) pass = 1;
+
+  /* or coding conditions in other way:
+  int pass = (a < x && b < y)
+          || (b < x && c < y)
+          || (c < x && a < y)
+          || (b < x && a < y)
+          || (c < x && b < y)
+          || (a < x && c < y);
+  */
+
+  if (pass)
+    printf("Will pass trought\n");
+  else
+    printf("Box too large\n");
+  return 0;
+}
diff --git a/c/console/expressions/expressions.c b/c/console/expressions/expressions.c
new file mode 100644
index 0000000..ea2ad56
--- /dev/null
+++ b/c/console/expressions/expressions.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <math.h>
+
+int main() {
+  float a = 10.f, b = 15.f, c = 20.f;
+  float result;
+
+  result = (1.f/4.f)*sqrtf((a+b+c)*(b+c-a)*(a+c-b)*(a+b-c));
+  printf( "Area of triangle with sides %f, %f and %f is %f\n",
+          a, b, c, result );
+
+  result = (1.f/3.f)*M_PI*a*(b*b);
+  printf( "Volume of cone with height %f and radius %f is %f\n",
+          a, b, result );
+
+  result = (4.f/3.f)*M_PI*a*b*c;
+  printf( "Volume of ellipsoid with radiuses %f, %f and %f is %f\n",
+          a, b, c, result );
+
+  return 0;
+}
diff --git a/c/console/hello-world/helloworld.c b/c/console/hello-world/helloworld.c
new file mode 100644
index 0000000..dafadc7
--- /dev/null
+++ b/c/console/hello-world/helloworld.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main() {
+  printf("Hello World!\n");
+  return 0;
+}
diff --git a/c/console/readme b/c/console/readme
new file mode 100644
index 0000000..555cbcc
--- /dev/null
+++ b/c/console/readme
@@ -0,0 +1,2 @@
+GCC commandline to compile each example is:
+  gcc -lm *.c
diff --git a/c/console/sum/sum.c b/c/console/sum/sum.c
new file mode 100644
index 0000000..b917f2f
--- /dev/null
+++ b/c/console/sum/sum.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main() {
+  int a, b, c;
+
+  printf("Enter A: ");
+  scanf("%d", &a);
+
+  printf("Enter B: ");
+  scanf("%d", &b);
+
+  c = a + b;
+  printf("%d + %d = %d\n", a, b, c);
+
+  return 0;
+}
diff --git a/c/console/support/support.c b/c/console/support/support.c
new file mode 100644
index 0000000..d292999
--- /dev/null
+++ b/c/console/support/support.c
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <string.h>
+
+int main() {
+  char s[10];
+
+  printf("Have you any problem? (yes/no)\n");
+  scanf("%5s", s);
+  while (strcmp(s, "yes") == 0) {
+    printf("Have you a problem with electronic devices? (yes/no)\n");
+    scanf("%5s", s);
+    if (strcmp(s, "yes") == 0) {
+      printf("Have you a problem with TV? (yes/no)\n");
+      scanf("%5s", s);
+      if (strcmp(s, "yes") == 0) {
+        printf("You must to go to TV master\n");
+      } else {
+        printf("Have you a problem with computer? (yes/no)\n");
+        scanf("%5s", s);
+        if (strcmp(s, "yes") == 0)
+          printf("You must go to sysadmin\n");
+        else
+          printf("I am sorry, I cannot help you.\n");
+      }
+    } else {
+      printf("Have you a problem with teapot? (yes/no)\n");
+      scanf("%5s", s);
+      if (strcmp(s, "yes") == 0) {
+        printf("Was you teapot broken? (yes/no)\n");
+        scanf("%5s", s);
+        if (strcmp(s, "yes") == 0)
+          printf("You must buy our super glue\n");
+        else
+          printf("I am sorry, I cannot help you.\n");
+      } else {
+        printf("I am sorry, I cannot help you.\n");
+      }
+    }
+
+    printf("Have you other problems? (yes/no)\n");
+    scanf("%5s", s);
+  }
+
+  printf("Good bye\n");
+  return 0;
+}
diff --git a/c/console/talk/talk.c b/c/console/talk/talk.c
new file mode 100644
index 0000000..7338cfe
--- /dev/null
+++ b/c/console/talk/talk.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main() {
+  char say[100], name[100];
+
+  printf("Hello!\n");
+  scanf("%99s", say);
+
+  printf("What is your name?\n");
+  scanf("%99s", name);
+
+  printf("Nice to meet you, %s\n", name);
+  printf("How are you?\n");
+  scanf("%99s", say);
+
+  printf("Oh.. program ends\n");
+  printf("Good bye, %s\n", name);
+  scanf("%99s", say);
+
+  return 0;
+}