create assignment03

assignment03/project2.c

@@ -0,0 +1,111 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define NO_SIZE 0
+#define INTEGER 1
+#define FLOAT   2
+#define STRING  3
+#define BUFFER_SIZE 256
+
+void swap(void *a, void *b, size_t size)
+{
+    void *tmp;
+
+    tmp = malloc(size);
+
+    memcpy(tmp, a,   size);
+    memcpy(a,   b,   size);
+    memcpy(b,   tmp, size);
+
+    free(tmp);
+}
+
+void printValue(char *message, void *data, int type)
+{
+    printf("%s ", message);
+
+    switch (type)
+    {
+        case INTEGER:
+            printf("%d\n", *((int*) data));
+            break;
+
+        case FLOAT:
+            printf("%.1f\n", *((float *) data));
+            break;
+
+        case STRING:
+            printf("%s\n", (char *) data);
+            break;
+    }
+}
+
+int main(void)
+{
+    int type;
+    int validType;
+
+    do
+    {
+        printf("Choose a data type:\n");
+        printf("Integer (1)\n");
+        printf("Float   (2)\n");
+        printf("String  (3)\n");
+
+        scanf("%d", &type);
+
+        validType = type >= INTEGER && type <= STRING;
+
+        if (!validType)
+        {
+            printf("Invalid Data Type\n\n");
+        }
+
+    } while (!validType);
+
+    char   *format;
+    size_t size;
+
+    format = type == INTEGER ? "%d" :
+             type == FLOAT   ? "%f" :
+             type == STRING  ? "%255s" :
+             NULL;
+
+    size = type == INTEGER ? sizeof(int)   :
+           type == FLOAT   ? sizeof(float) :
+           type == STRING  ? sizeof(char) * BUFFER_SIZE  :
+           0;
+
+    if (format == NULL || size == NO_SIZE)
+    {
+        printf("Invalid Data Type");
+        return 1;
+    }
+
+    void *a;
+    void *b;
+
+    a = malloc(size);
+    b = malloc(size);
+
+    printf("\nEnter value A: ");
+    scanf(format, a);
+
+    printf("Enter value B: ");
+    scanf(format, b);
+
+    printValue("\nA value before: ", a, type);
+    printValue("B value before: ", b, type);
+
+    printf("\nSwapping...\n\n");
+    swap(a, b, size);
+
+    printValue("A value after:  ", a, type);
+    printValue("B value after:  ", b, type);
+
+    free(a);
+    free(b);
+
+    return 0;
+}