little div prog and cleaning userspace

6 files changed, 25 insertions, 35 deletions

diff --git a/userspace/brainfuck.c b/userspace/brainfuck.c
index c608064..a30ea7c 100644
--- a/userspace/brainfuck.c
+++ b/userspace/brainfuck.c
@@ -5,8 +5,6 @@
     
     Author: Felix Oghină
     License: (brain)fuck licenses!
-
-
 */
 
 // taken from: http://it-ride.blogspot.com/2009/11/brainfuck-interpreter.html
diff --git a/userspace/checker.c b/userspace/checker.c
deleted file mode 100644
index ac0bcc9..0000000
--- a/userspace/checker.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <stdio.h>
-
-int main()
-
-{
-FILE *fp;                     /* The file handle for input data */
-fp=stdin;
-int ch;                       /* Each character read. */
-int checksum = 0;             /* The checksum mod 2^16. */
-int count=0;
- 
-printf("this will calc a simple checksum of the enered text\nPress Left Control + D to signify end of file \n",checksum,count);
-while ((ch = getc(fp)) != EOF) {
-        checksum = (checksum >> 1) + ((checksum & 1) << 15);
-	    checksum +=(int) ch;
-	        checksum &= 0xffff;       /* Keep it within bounds. */
-		count++;
-}
-printf("checksum : 0x%08X for %i bytes\n",checksum,count);
-}
diff --git a/userspace/clear.c b/userspace/clear.c
index 9557760..1c794b8 100644
--- a/userspace/clear.c
+++ b/userspace/clear.c
@@ -1,3 +1,5 @@
+/** clear our console */
+
 #include <stdio.h>
 int main()
 {
diff --git a/userspace/div.c b/userspace/div.c
new file mode 100644
index 0000000..595084e
--- /dev/null
+++ b/userspace/div.c
@@ -0,0 +1,23 @@
+// divide one param by another //
+// can be easily be used to provoke division by zero excpetion //
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+    if (argc!=3)
+    {
+	printf("Divide two integers and print result \n");
+	printf("usage : %s [quotient] [divisor]\n",argv[0]);
+	return EXIT_FAILURE;
+    }
+
+    int q=atoi(argv[1]);
+    int d=atoi(argv[2]);
+    printf("Divide %i by %i\n",q,d);
+    printf("%i  /  %i = %i\n",q,d,q/d);
+    printf("%i mod %i = %i\n",q,d,q%d);
+
+	return EXIT_SUCCESS;
+}
diff --git a/userspace/err.c b/userspace/err.c
deleted file mode 100644
index 8e5d819..0000000
--- a/userspace/err.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <stdio.h>
-
-int main(int argc, char **argv)
-{   
-    char buf[]="This is a line written to stderr.\n";
-    int l=fwrite(buf,sizeof(char),strlen(buf),stderr); // write stderr;
-    printf("Written %i chars to stderr.\n",l);
-    return 0;
-}
diff --git a/userspace/exception.c b/userspace/exception.c
deleted file mode 100644
index 4f72c86..0000000
--- a/userspace/exception.c
+++ /dev/null
@@ -1,4 +0,0 @@
-int main()
-{
-    return 10/0;
-}