Diff: main.cpp

Revision:

3:45a53383e09f

Parent:

2:761d1c20f740

Child:

4:b36f0369c752

--- a/main.cpp	Mon Oct 23 12:31:42 2017 +0000
+++ b/main.cpp	Wed Nov 08 03:31:24 2017 +0000
@@ -1,44 +1,86 @@
 /*
-    Project: ArraySizeof
+    Project: StructPlay
     File: main.cpp
     Ported to mbed/Nucleo by: Dr. C. S. Tritt
-    Last revised: 10/22/17 (v. 1.1)
+    Last revised: 11/7/17 (v. 1.0)
 
-    Demonstrates array output.
-
+    Demonstrates various struct usage. All of this code was taken from Horton 
+    Chapter 11 and modified.
 */
 #include "mbed.h"
 
+struct Family {
+    char name[20];
+    int age;
+    char father[20];
+    char mother[20];
+};
+typedef struct Family Family;
+
+// Declare the function.
+bool siblings(Family member1, Family member2); 
+bool siblingsWP(Family const *pmember1, Family const *pmember2);
+
 int main(void)
 {
-    // Create a 2-D array.
-    int myNum[3][4] = {
-        { 10, 20, 30, 40 }, // Values for first row
-        { 15, 25, 35, 45 }, // Values for second row
-        { 47, 48, 49, 50 }  // Values for third row
+    // Create a Horse structure.
+    struct Horse {
+        int age;
+        int height;
+        char name[20];
+        char father[20];
+        char mother[20];
     };
+    typedef struct Horse Horse;
+    Horse trigger = {
+        .name = "Trigger", .mother = "Wesson", .father = "Smith"
+    };
+    trigger.age = 30;
+    trigger.height = 15;
     
-    printf("\n\nArray output...\n\n");
-    // Known sizes.
-    for (int r = 0; r < 3; r++) {
-        for (int c = 0; c < 4; c++) {
-            printf("%d   ", myNum[r][c]);
-        }
-        printf("\n");
-    }
+    printf("Trigger's old mom: %s.\n", trigger.mother);
+    strcpy(trigger.mother, "Crisco"); // Size should be checked!
+    printf("Trigger's new mom: %s.\n", trigger.mother);
     
-    // For mbed/Nucleo boards, the final \n is generally required to see output.
-    printf("\nElement size (sizeof(myNum[0][0]): %u.\n", sizeof(myNum[0][0]));
-    printf("Row size (sizeof(myNum[0]): %u.\n", sizeof(myNum[0])); // Row size.
-    printf("Array size (sizeof(myNum): %u.\n\n", sizeof(myNum)); // Total size.
+    Horse myHorse; // Structure variable declaration.
+
+    // Initialize the structure variable from entered data.
+    printf("Turn local echo on!\n" );
+    printf("Enter the name of the horse: " );
+    scanf("%s", myHorse.name); // Read the name. Dangerous.
+    printf("Name set to: %s.\n", myHorse.name);
+
+    printf("How old is %s? ", myHorse.name );
+    scanf("%d", &myHorse.age ); // Read the age.
+    printf("Age set to: %d.\n", myHorse.age);
+
+    Horse* pHorse = NULL;
+    Horse aHorse = { 3, 11, "Jimbo", "Trigger", "Nellie"};
+    pHorse = &aHorse;
+    printf("A horse's name is %s.\n", (*pHorse).name);
+    printf("Same horse's name is %s.\n", pHorse->name);
+    
+    Family newKid = {"Joe", 5, "Bill", "Mary"};
+    Family oldKid = {"Jane", 15, "Bob", "Mary"};
     
-    // Output using calculated sizes.
-    for (int r = 0; r < sizeof(myNum)/sizeof(myNum[0]); r++) {
-        for (int c = 0; c < sizeof(myNum[0])/sizeof(myNum[0][0]); c++) {
-            printf("%d   ", myNum[r][c]);
-        }
-        printf("\n");
-    }
-    
-    while (true) {} // Loop forever when done.
+    if (siblings(newKid, oldKid)) printf("They are!\n");
+    if (siblingsWP(&newKid, &oldKid)) printf("They are too!\n");
+
+    while (true) wait(3600.0f); // Loop forever when done.
+}
+
+bool siblings(Family member1, Family member2) // Define the function.
+{
+    if(strcmp(member1.mother, member2.mother) == 0)
+        return true;
+    else
+        return false;
+}
+
+bool siblingsWP(Family const *pmember1, Family const *pmember2)
+{
+  if(strcmp(pmember1->mother, pmember2->mother) == 0)
+    return true;
+  else
+    return false;
 }
\ No newline at end of file