Add first exercises of chapter 06

c_primer_plus/chapter06/01.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+
+
+int main(void) {
+
+  unsigned char abc [26];
+
+  for (size_t i = 'a'; i <= 'z'; i++) {
+    abc[i - 'a'] = i;
+  }
+
+  for (size_t i = 0; i < sizeof(abc); i++) {
+    printf("%c", abc[i]);
+  }
+
+  printf("\n");
+
+  return 0;
+
+}

c_primer_plus/chapter06/02.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+
+
+int main(void) {
+
+  for (size_t i = 0; i < 5; i++) {
+    for (size_t j = 0; j <= i; j++) {
+      printf("$");
+    }
+    printf("\n");
+  }
+
+  return 0;
+
+}

c_primer_plus/chapter06/03.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+
+
+int main(void) {
+
+  for (int i = 0; i < 6; i++) {
+    for (int j = 'F'; j >= ('F'-i); j--) {
+      printf("%c", j);
+    }
+    printf("\n");
+  }
+
+  return 0;
+
+}

c_primer_plus/chapter06/04.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+
+
+int main(void) {
+
+  unsigned char letter = 'A';
+
+  for (unsigned char i = 0; i < 6; i++) {
+    for (unsigned char j = letter; j <= (letter + i); j++) {
+      printf("%c", j);
+    }
+    letter += (i + 1);
+    printf("\n");
+  }
+
+  return 0;
+
+}

c_primer_plus/chapter06/Makefile

@@ -0,0 +1,10 @@
+SRC := $(shell ls *.c)
+
+
+%: %.c
+	gcc -Wall -Wextra $@.c -o $@
+
+
+.PHONY: clean
+clean:
+	@rm -f ??