added examples

6 files changed, 161 insertions, 5 deletions

diff --git a/.cvsignore b/.cvsignore
index f2fc256..f45c95d 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -2,8 +2,6 @@ tcc_g
 tcc
 tc2.c
 ex3
-ex1.c
-ex2.c
 otcc1.c
 doc
 tc3s.c
@@ -11,14 +9,11 @@ p3.c
 tc1.c
 error.c
 i386-gen1.c
-ex4.c
 test.out2
 test.out3
 web.sh
-ex3.c
 memdebug.c
 bench
-ex5.c
 tcc-newparse.c
 p1.c
 Makefile.uClibc
diff --git a/ex1.c b/ex1.c
new file mode 100755
index 0000000..2dcff7d
--- /dev/null
+++ b/ex1.c
@@ -0,0 +1,8 @@
+#! /usr/local/bin/tcc -run
+#include <tcclib.h>
+
+int main() 
+{
+    printf("Hello World\n");
+    return 0;
+}
diff --git a/ex2.c b/ex2.c
new file mode 100644
index 0000000..6368bee
--- /dev/null
+++ b/ex2.c
@@ -0,0 +1,97 @@
+#include "tcclib.h"
+
+#define N 20
+
+int nb_num;
+int tab[N];
+int stack_ptr;
+int stack_op[N];
+int stack_res[60];
+int result;
+
+int find(int n, int i1, int a, int b, int op)
+{
+    int i, j;
+    int c;
+
+    if (stack_ptr >= 0) {
+        stack_res[3*stack_ptr] = a;
+        stack_op[stack_ptr] = op;
+        stack_res[3*stack_ptr+1] = b;
+        stack_res[3*stack_ptr+2] = n;
+        if (n == result)
+            return 1;
+        tab[i1] = n;
+    }
+    
+    for(i=0;i<nb_num;i++) {
+        for(j=i+1;j<nb_num;j++) {
+            a = tab[i];
+            b = tab[j];
+            if (a != 0 && b != 0) {
+
+                tab[j] = 0;
+                stack_ptr++;
+
+                if (find(a + b, i, a, b, '+'))
+                    return 1;
+                if (find(a - b, i, a, b, '-'))
+                    return 1;
+                if (find(b - a, i, b, a, '-'))
+                    return 1;
+                if (find(a * b, i, a, b, '*'))
+                    return 1;
+                if (b != 0) {
+                    c = a / b;
+                    if (find(c, i, a, b, '/'))
+                        return 1;
+                }
+
+                if (a != 0) {
+                    c = b / a;
+                    if (find(c, i, b, a, '/'))
+                        return 1;
+                }
+                
+                stack_ptr--;
+                tab[i] = a;
+                tab[j] = b;
+            }
+        }
+    }
+
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    int i, res, p;
+    
+    if (argc < 3) {
+        printf("usage: %s: result numbers...\n"
+               "Try to find result from numbers with the 4 basic operations.\n", argv[0]);
+        exit(1);
+    }
+
+    p = 1;
+    result = atoi(argv[p]);
+    printf("result=%d\n", result);
+    nb_num = 0;
+    for(i=p+1;i<argc;i++) {
+        tab[nb_num++] = atoi(argv[i]);
+    }
+
+    stack_ptr = -1;
+    res = find(0, 0, 0, 0, ' ');
+    if (res) {
+        for(i=0;i<=stack_ptr;i++) {
+            printf("%d %c %d = %d\n", 
+                   stack_res[3*i], stack_op[i],
+                   stack_res[3*i+1], stack_res[3*i+2]);
+        }
+        return 0;
+    } else {
+        printf("Impossible\n");
+        return 1;
+    }
+}
diff --git a/ex3.c b/ex3.c
new file mode 100644
index 0000000..6f6f630
--- /dev/null
+++ b/ex3.c
@@ -0,0 +1,23 @@
+#include <tcclib.h>
+
+int fib(n)
+{
+    if (n <= 2)
+        return 1;
+    else
+        return fib(n-1) + fib(n-2);
+}
+
+int main(int argc, char **argv) 
+{
+    int n;
+    if (argc < 2) {
+        printf("usage: fib n\n"
+               "Compute nth Fibonacci number\n");
+        return 1;
+    }
+        
+    n = atoi(argv[1]);
+    printf("fib(%d) = %d\n", n, fib(n, 2));
+    return 0;
+}
diff --git a/ex4.c b/ex4.c
new file mode 100755
index 0000000..3a3fed7
--- /dev/null
+++ b/ex4.c
@@ -0,0 +1,25 @@
+#!./tcc -run -L/usr/X11R6/lib -lX11
+#include <stdlib.h>
+/* Yes, TCC can use X11 too ! */
+#include <stdio.h>
+#include <X11/Xlib.h>
+
+int main(int argc, char **argv)
+{
+    Display *display;
+    Screen *screen;
+
+    display = XOpenDisplay("");
+    if (!display) {
+        fprintf(stderr, "Could not open X11 display\n");
+        exit(1);
+    }
+    printf("X11 display opened.\n");
+    screen = XScreenOfDisplay(display, 0);
+    printf("width = %d\nheight = %d\ndepth = %d\n", 
+           screen->width, 
+           screen->height,
+           screen->root_depth);
+    XCloseDisplay(display);
+    return 0;
+}
diff --git a/ex5.c b/ex5.c
new file mode 100644
index 0000000..da625c5
--- /dev/null
+++ b/ex5.c
@@ -0,0 +1,8 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int main() 
+{
+    printf("Hello World\n");
+    return 0;
+}