From 80467d446861240117422e5429e8c2eb305a376d Mon Sep 17 00:00:00 2001
From: angrave <angrave@illinois.edu>
Date: Thu, 6 Aug 2015 14:11:59 -0500
Subject: [PATCH] helloworld.c
---
hello.c | 13 +++++++++++++
helloworld.c | 22 ++++++++++++++++++++++
2 files changed, 35 insertions(+)
create mode 100644 hello.c
create mode 100644 helloworld.c
diff --git a/hello.c b/hello.c
new file mode 100644
index 0000000..12121ff
--- /dev/null
+++ b/hello.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main() {
+ puts("Hello World");
+ printf("The answer is %d\n",42);
+ putchar('\n');
+ fprintf(stdout,"Yes\n");
+
+ write(1,"Yes!",strlen("Yes!"));
+ return 42;
+}
diff --git a/helloworld.c b/helloworld.c
new file mode 100644
index 0000000..fd513b5
--- /dev/null
+++ b/helloworld.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main() {
+ puts("Hello World"); // puts "put string" also prints a newline
+
+ printf("The answer is %d\n",42); // "print formatted"
+
+ putchar('\n'); // Print a single character
+
+ fprintf(stdout,"Yes\n"); // print to a file - in this case standard out
+
+ // All of the above are well known C standard library functions
+ // Under the covers, the actual writing requires a system call.
+ // Linux supports the POSIX API. All of the above ultimately call write:
+
+ // The system call to send 5 bytes to file descriptor #1 (standout output)
+ write(1, "POSIX", 5 );
+ write(1, " ROCKS", strlen(" ROCKS"));
+ return 42;
+}
--
GitLab