From ab79618ba19b920b7d55b0bad4d9665a15193bb7 Mon Sep 17 00:00:00 2001
From: pankunull <panku_null@proton.me>
Date: Thu, 14 Aug 2025 20:55:44 +0200
Subject: added src code

---
 ctof    | Bin 0 -> 15648 bytes
 ctof.c  |  44 ++++++++++++++++++++++++++++++++++++++++++++
 dir     | Bin 0 -> 15624 bytes
 dir.c   |  17 +++++++++++++++++
 main    | Bin 0 -> 15552 bytes
 main.c  |  25 +++++++++++++++++++++++++
 main2   | Bin 0 -> 15416 bytes
 main2.c |   6 ++++++
 shift   | Bin 0 -> 15672 bytes
 shift.c |  32 ++++++++++++++++++++++++++++++++
 10 files changed, 124 insertions(+)
 create mode 100755 ctof
 create mode 100644 ctof.c
 create mode 100755 dir
 create mode 100644 dir.c
 create mode 100755 main
 create mode 100644 main.c
 create mode 100755 main2
 create mode 100644 main2.c
 create mode 100755 shift
 create mode 100644 shift.c

diff --git a/ctof b/ctof
new file mode 100755
index 0000000..7a47ff7
Binary files /dev/null and b/ctof differ
diff --git a/ctof.c b/ctof.c
new file mode 100644
index 0000000..e61cfcd
--- /dev/null
+++ b/ctof.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h> // for errno
+#include <limits.h> // for INT_MAX, INT_MIN
+
+
+/*
+    F = C x 9/5 + 32
+*/
+
+int
+main(int argc, char *argv[])
+{
+
+    if (argc < 2) {
+        printf("Usage: %s number\n", argv[0]);
+        return 1;
+    }
+
+    char *endptr;
+
+    errno = 0; // reset errno
+
+    long value = strtol(argv[1], &endptr, 10); // base 10
+
+    if (endptr == argv[1]) {
+        printf("Error: No digits were found\n");
+        return 1;
+    }
+    if (*endptr != '\0') {
+        printf("Warning: Trailing characters after number: %s\n", endptr);
+        return 1;
+    }
+    if ((value == LONG_MAX || value == LONG_MIN) && errno == ERANGE) {
+        printf("Error: Number out of range\n");
+        return 1;
+    }
+
+    float fah = value * 9/5 + 32;
+
+    printf("Fahrenheit: %0.f\n", fah);
+
+    return 0;
+}
diff --git a/dir b/dir
new file mode 100755
index 0000000..7757a29
Binary files /dev/null and b/dir differ
diff --git a/dir.c b/dir.c
new file mode 100644
index 0000000..05803fd
--- /dev/null
+++ b/dir.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <dirent.h>
+
+int main() {
+    DIR *d;
+    struct dirent *dir;
+    d = opendir(".");
+    if (d) {
+        while ((dir = readdir(d)) != NULL) {
+            printf("%s\n", dir->d_name);
+        }
+        closedir(d);
+    } else {
+        perror("opendir");
+    }
+    return 0;
+}
diff --git a/main b/main
new file mode 100755
index 0000000..37336e8
Binary files /dev/null and b/main differ
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..30d5c61
--- /dev/null
+++ b/main.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+// Function that tries to change a number without pointer
+void noPointerChange(int num) {
+    num = 100;  // Changes local copy only
+}
+
+// Function that changes a number using pointer
+void pointerChange(int *numPtr) {
+    *numPtr = 100;  // Changes original value through pointer
+}
+
+int main() {
+    int value = 50;
+
+    printf("Before noPointerChange: %d\n", value);
+    noPointerChange(value);
+    printf("After noPointerChange: %d\n", value);  // value unchanged
+
+    printf("Before pointerChange: %d\n", value);
+    pointerChange(&value);
+    printf("After pointerChange: %d\n", value);    // value changed
+
+    return 0;
+}
diff --git a/main2 b/main2
new file mode 100755
index 0000000..c35260e
Binary files /dev/null and b/main2 differ
diff --git a/main2.c b/main2.c
new file mode 100644
index 0000000..c63efdb
--- /dev/null
+++ b/main2.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+main()
+{
+    printf("Hello C\n");
+}
diff --git a/shift b/shift
new file mode 100755
index 0000000..6429b03
Binary files /dev/null and b/shift differ
diff --git a/shift.c b/shift.c
new file mode 100644
index 0000000..c65b815
--- /dev/null
+++ b/shift.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+void print_binary(unsigned char value) {
+    for (int i = 7; i >= 0; i--) {
+        printf("%d", (value >> i) & 1);
+    }
+    printf("\n");
+}
+
+int main() {
+    unsigned char value = 0; // start with all bits off
+    int bit;
+
+    printf("Starting value: ");
+    print_binary(value);
+
+    while (1) {
+        printf("Enter bit to toggle (0-7), or -1 to quit: ");
+        if (scanf("%d", &bit) != 1) break;
+        if (bit == -1) break;
+        if (bit < 0 || bit > 7) {
+            printf("Invalid bit.\n");
+            continue;
+        }
+
+        value ^= (1 << bit); // toggle the chosen bit
+        printf("Current value: ");
+        print_binary(value);
+    }
+
+    return 0;
+}
-- 
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