add edge case in 0-sum_them_all and add task 1-print_numbers

Author: hackerSa3edy

0x10-variadic_functions/0-sum_them_all.c

@@ -12,6 +12,9 @@ int sum_them_all(const unsigned int n, ...)
 	unsigned int index, result = 0;
 	va_list ptr;
 
+	if (n == 0)
+		return (0);
+
 	va_start(ptr, n);
 
 	for (index = 0; index < n; index++)

0x10-variadic_functions/1-main.c

@@ -0,0 +1,12 @@
+#include "variadic_functions.h"
+
+/**
+ * main - check the code
+ *
+ * Return: Always 0.
+ */
+int main(void)
+{
+    print_numbers(", ", 4, 0, 98, -1024, 402);
+    return (0);
+}

0x10-variadic_functions/1-print_numbers.c

@@ -0,0 +1,29 @@
+#include "variadic_functions.h"
+#include <stdio.h>
+
+/**
+ * print_numbers - prints numbers, followed by a new line.
+ *
+ * @separator: numbers' separator
+ * @n: number of args.
+ *
+ * Return: Nothing.
+ */
+void print_numbers(const char *separator, const unsigned int n, ...)
+{
+	unsigned int index;
+	va_list ptr;
+
+	if (separator == NULL)
+		return;
+
+	va_start(ptr, n);
+	for (index = 0; index < n; index++)
+	{
+		printf("%i", va_arg(ptr, int));
+		if (index != n - 1)
+			printf("%s", separator);
+	}
+
+	printf("\n");
+}

0x10-variadic_functions/variadic_functions.h

@@ -3,5 +3,6 @@
 #include <stdarg.h>
 
 int sum_them_all(const unsigned int, ...);
+void print_numbers(const char *, const unsigned int, ...);
 
 #endif /* VARIADIC_FUNCTIONS_H */