From 413f1f19184acd9024b9a97156c467b88ff72484 Mon Sep 17 00:00:00 2001
From: Miguel <m.i@gmx.at>
Date: Fri, 17 Aug 2018 03:57:35 +0200
Subject: math, time, seed and randomness - simple test

---
 userspace/Makefile    |  8 ++++----
 userspace/add.c       | 41 -----------------------------------------
 userspace/crt0.S      |  3 ---
 userspace/task1.c     |  1 -
 userspace/test-math.c | 32 ++++++++++++++++++++++++++++++++
 5 files changed, 36 insertions(+), 49 deletions(-)
 delete mode 100644 userspace/add.c
 create mode 100644 userspace/test-math.c

(limited to 'userspace')

diff --git a/userspace/Makefile b/userspace/Makefile
index 62bc857..2812edd 100644
--- a/userspace/Makefile
+++ b/userspace/Makefile
@@ -1,4 +1,3 @@
-
 CC=i686-foolos-gcc
 CC=i686-elf-gcc
 
@@ -12,9 +11,10 @@ CFLAGS+=-g
 #CFLAGS+=-fstack-protector-all
 
 #LDFLAGS=-nostdlib
-LDFLAGS=-L/home/miguel/foolos/usr/i686-foolos/lib/ -lc -lm -lg -lnosys
+LDFLAGS=-L/home/miguel/foolos/usr/i686-foolos/lib/ 
+LDLIBS=-lc -lm -lg -lnosys
 
-PROGS=foolshell ls simple brainfuck add checker clear task1 task2 init cat snake
+PROGS=foolshell ls simple brainfuck test-math checker clear task1 task2 init cat snake
 
 include ../Makefile.common
 
@@ -50,7 +50,7 @@ brainfuck: brainfuck.o
 snake: snake.o
 foolshell: foolshell.o
 simple: simple.o
-add: add.o
+test-math: test-math.o
 checker: checker.o
 task1: task1.o
 task2: task2.o
diff --git a/userspace/add.c b/userspace/add.c
deleted file mode 100644
index 94bb244..0000000
--- a/userspace/add.c
+++ /dev/null
@@ -1,41 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <math.h>
-#include "../fs/fs.h"
-
-int main(int argc, char **argv) 
-{
-
-    float sum=0;
-    float i=0;
-
-    char *buf=malloc(256);
-    puts("\n*** fools calculator ***");
-    
-    while(1)
-    {
-	printf("enter numer (or 'exit' to finish) %i: ",i+1);
-        fgets(buf,255,stdin);
-
-	if(buf[1]=='x')break;
-
-	i++;
-	sum+=atoi(buf);
-    }
-
-    if(i!=0)
-    {
-	puts("--------");
-	printf("sum = %f \n",sum);
-	printf("avg = %f \n",sum/i);
-//	printf("sin(avg) = %f \n\n",sin(sum/i));
-    }
-
-    return 0;
-}
-
-
-
-
-
diff --git a/userspace/crt0.S b/userspace/crt0.S
index 4c08f89..23efec5 100644
--- a/userspace/crt0.S
+++ b/userspace/crt0.S
@@ -24,6 +24,3 @@ call _exit2
 .wait:
     hlt
 jmp .wait
-
-.hellostr:
-.ascii "Hello Ass"
diff --git a/userspace/task1.c b/userspace/task1.c
index d9875f4..793b7f8 100644
--- a/userspace/task1.c
+++ b/userspace/task1.c
@@ -27,7 +27,6 @@ ULL fib(ULL i)
 }
 
 
-
 int main(unsigned int argc, char **argv)
 {
     ULL i=0;
diff --git a/userspace/test-math.c b/userspace/test-math.c
new file mode 100644
index 0000000..acaecad
--- /dev/null
+++ b/userspace/test-math.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+
+int main(int argc, char **argv) 
+{
+     time_t ltime;
+     time(&ltime); 
+     printf("the time is %s", ctime(&ltime));
+
+     unsigned int seed=time(NULL);
+     printf("seed = %u\n",seed);
+
+     srand(seed);
+
+     for(int i=0;i<10;i++)
+     {
+	 int r=rand()%100;
+	 printf("sin(%i) = %f \n",r,sin(r));
+     }
+
+
+     return 0;
+}
+
+
+
+
+
-- 
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