Changement de disposition

TP1/Exo5/alignement.c

@@ -0,0 +1,68 @@
+/* alignement et objets */
+
+struct exemple1 {
+	int x;
+	int y;
+	int z;
+	int w;
+};
+
+struct exemple2 {
+	char x;
+	char y;
+	char z;
+	char w;
+};
+
+struct exemple3 {
+	int x;
+	int y;
+	char z;
+	char w;
+};
+
+struct exemple4 {
+	int x;
+	char y;
+	int z;
+	char w;
+};
+
+union exemple5 {
+	int x;
+	char y;
+	int z;
+	char w;
+};
+
+int main()
+{
+	int a[4] = {1,2,3,4};
+	char c[4] = {'a','b','c','d'};
+	struct exemple1 ex1 = {1,2,3,4}; 
+	struct exemple2 ex2 = {'a','b','c','d'}; 
+	struct exemple3 ex3 = {1,2,'c','d'}; 
+	struct exemple4 ex4 = {1,'c',2,'d'}; 
+	union exemple5 ex5; 
+	int x = 61;
+	char y = 62;
+	int z = 63;
+	char w = 64;
+	ex5.x=62;ex5.y=63;ex5.z=64;ex5.w=65;
+
+	// appelez hexdump pour chaque variable
+	hexdump(a, sizeof(a));
+	hexdump(c, sizeof(c));
+	hexdump(&ex1, sizeof(ex1));
+	hexdump(&ex2, sizeof(ex2));
+	hexdump(&ex3, sizeof(ex3));
+	hexdump(&ex4, sizeof(ex4));
+	hexdump(&ex5, sizeof(ex5));
+	hexdump(&x, sizeof(x));
+	hexdump(&y, sizeof(y));
+	hexdump(&z, sizeof(z));
+	hexdump(&w, sizeof(w));
+	
+	return 0;
+}
+

TP1/Exo5/exo5.c

@@ -0,0 +1,37 @@
+#include<stdio.h>
+#include<time.h>
+#include<stdlib.h>
+#include<string.h>
+#include<assert.h>
+
+void hexdump(void *ptr, size_t size) {
+    unsigned char *p = ptr;
+    unsigned char *end = p + size;
+    char ascii[17];
+    size_t i;
+    for (i = 0; i < 16; ++i) {
+        ascii[i] = '\0';
+    }
+    i = 0;
+    while (p != end) {
+        if (i % 16 == 0) {
+            if (i != 0) {
+                printf("  |%s|\n", ascii);
+            }
+            printf("%p  ", p);
+        }
+        printf("%02X ", *p);
+        if (*p >= ' ' && *p <= '~') {
+            ascii[i % 16] = *p;
+        } else {
+            ascii[i % 16] = '.';
+        }
+        ++p;
+        ++i;
+    }
+    while (i % 16 != 0) {
+        printf("   ");
+        ++i;
+    }
+    printf("  |%s|\n", ascii);
+}