Add remeainig prog examples of chapter 05

c_primer_plus/chapter05/05.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <limits.h>
+
+
+
+int getNumber(void);
+
+
+int main(void) {
+
+  int count = 0;
+  int sum   = 0;
+  int end   = getNumber();
+
+  if (end >= 0) {
+
+    while (count++ < end) {
+      if ((INT_MAX - sum) < count) {
+        printf("Integer overflow\n");
+        return 1;
+      } else {
+        sum = sum + count;
+      }
+    }
+
+    printf("sum = %d\n", sum);
+
+  }
+
+  return 0;
+
+}
+
+
+int getNumber(void) {
+
+  int number;
+
+  printf("How far should we add: ");
+
+  if (!scanf("%d", &number)  || number < 0) {
+    number = -1;
+  }
+
+  return number;
+
+}

c_primer_plus/chapter05/06.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <limits.h>
+
+
+
+int getNumber(void);
+
+
+int main(void) {
+
+  int count = 0;
+  int sum   = 0;
+  int end   = getNumber();
+
+  if (end >= 0) {
+
+    while (count++ < end) {
+      if (INT_MAX / count < count || (INT_MAX - sum) < count * count) {
+        printf("Integer overflow\n");
+        return 1;
+      } else {
+        sum = sum + count * count;
+      }
+    }
+
+    printf("sum = %d\n", sum);
+
+  }
+
+  return 0;
+
+}
+
+
+int getNumber(void) {
+
+  int number;
+
+  printf("How far should we add: ");
+
+  if (!scanf("%d", &number)  || number < 0) {
+    number = -1;
+  }
+
+  return number;
+
+}

c_primer_plus/chapter05/07.c

@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <math.h>
+#include <fenv.h>
+
+
+
+double cubeNumber(double number);
+
+
+int main (void) {
+
+  double number;
+  double cube_number;
+  int    error = 0;
+
+  printf("Give a number: ");
+
+  if (scanf("%lf", &number) != 1 || isnan(number)) {
+    printf("Not a number!\n");
+    error = 1;
+  } else {
+    cube_number = cubeNumber(number);
+    if (cube_number != NAN) {
+      printf("%lf\n", cube_number);
+    } else {
+      printf("Floating point exception occured!\n");
+      error = 1;
+    }
+  }
+
+  return error;
+
+}
+
+
+double cubeNumber (double number) {
+
+  double i;
+
+  feclearexcept(FE_ALL_EXCEPT);
+
+  i = pow(number, 3);
+
+  if (fetestexcept(FE_ALL_EXCEPT) == 0) {
+    i = NAN;
+  }
+
+  return i;
+
+}

c_primer_plus/chapter05/08.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <limits.h>
+#include <stdbool.h>
+
+
+
+int getNumber(char * s, bool *error);
+
+
+int main(void) {
+
+  int first_operand;
+  int second_operand;
+  bool first_error;
+  bool second_error;
+
+  printf("This program computes moduli.\n");
+
+  second_operand = getNumber("Enter an integer to serve as the second operand: ", &second_error);
+  first_operand  = getNumber("Now enter the first operand: ", &first_error);
+
+  do {
+    printf("%d %% %d is %d\n", first_operand, second_operand, first_operand % second_operand);
+    first_operand  = getNumber("Now enter the first operand (<= 0 to quit): ", &first_error);
+  } while (!first_error && !second_error);
+
+  return 0;
+
+}
+
+
+int getNumber(char * s, bool *error) {
+
+  int number;
+
+  *error = false;
+
+  printf("%s", s);
+
+  if (!scanf("%d", &number) || number < 0) {
+    *error = true;
+  }
+
+  return number;
+
+}

c_primer_plus/chapter05/09.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <limits.h>
+#include <math.h>
+#include <stdbool.h>
+
+
+
+double getNumber(char * s);
+void calcTemperatures(double fahrenheit);
+
+
+int main(void) {
+
+  double fahrenheit;
+
+  printf("This program calculates Celsius & Kelvin from Fahrenheit.\n");
+  fahrenheit  = getNumber("Now enter the temp in Fahrenheit: ");
+
+  while (!isnan(fahrenheit)) {
+    calcTemperatures(fahrenheit);
+    fahrenheit  = getNumber("Now enter the first operand (q to quit): ");
+  };
+
+  return 0;
+
+}
+
+
+double getNumber(char * s) {
+
+  double number;
+
+  printf("%s", s);
+
+  if (!scanf("%lf", &number) || isnan(number)) {
+    number = NAN;
+  }
+
+  return number;
+
+}
+
+
+void calcTemperatures(double fahrenheit) {
+
+  const float celsius_div    = 5.0 / 9.0;
+  const float celsius_offset = 32.0;
+  const float kelvin_offset  = 273.16;
+
+  const double celsius = celsius_div *(fahrenheit - celsius_offset);
+  const double kelvin  = celsius + kelvin_offset;
+
+  printf("%.2lf Fahrenheit are %.2lf Celsius or %.2lf Kelvin.\n", fahrenheit, celsius, kelvin);
+
+}