the first commit: add show_bytes.c

README

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+This project just do for my csapp practice, over.

show_bytes.c

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+#include <stdio.h>
+
+typedef unsigned char *byte_pointer;
+
+void show_bytes(byte_pointer start, size_t len) {
+	size_t i;
+	for (i = 0; i < len; i++)
+		printf(" %.2x", start[i]);
+	printf("\n");
+}
+
+void show_int(int x) {
+	show_bytes((byte_pointer) &x, sizeof(int));
+}
+
+void show_float(float x) {
+	show_bytes((byte_pointer) &x, sizeof(float));
+}
+
+void show_pointer(void *x) {
+	show_bytes((byte_pointer) &x, sizeof(void *));
+}
+
+void test_show_bytes(int val) {
+	int ival = val;
+	float fval = (float) ival;
+	int *pval = &ival;
+	show_int(ival);
+	show_float(fval);
+	show_pointer(pval);
+}
+
+void main(void) {
+	int test_val = 12345;
+	test_show_bytes(test_val);
+}