ДЗ № 12.2 Double под микроскопом, Шестаков Николай

.clang-format

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.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: "weekly"

.github/workflows/build-and-lint.yml

@@ -0,0 +1,14 @@
+name: Build and lint
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  check-format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: Check format
+        run: |
+          find . -path ./build -prune -o -type f -name '*.[c|h]' -print | xargs clang-format-18 --style=file --dry-run -Werror

.gitignore

@@ -55,4 +55,7 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+# CMake
+build
+
 # End of https://www.toptal.com/developers/gitignore/api/c

CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.25)
+project(double_under_microscope C)
+
+add_executable(double_under_microscope src/double_under_microscope/double_under_microscope.c)
+target_compile_options(double_under_microscope PRIVATE -Wall -Wextra -pedantic)

src/double_under_microscope/double_under_microscope.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+typedef struct BitField {
+    unsigned long mantissa : 52;
+    unsigned int exp : 11;
+    unsigned int sign : 1;
+} BitField;
+
+typedef union Number {
+    double number;
+    BitField bitField;
+} Number;
+
+int main()
+{
+    Number number;
+    printf("Enter a number: ");
+    scanf("%lf", &number.number);
+
+    char sign = number.bitField.sign ? '-' : '+';
+    // Считаем экспоненту.
+    int exponent = number.bitField.exp - 1023;
+    // Считаем мантиссу.
+    double mantissa = number.bitField.mantissa;
+    unsigned long two_in_52_pow = 1;
+    two_in_52_pow = two_in_52_pow << 52;
+    double mantissaNormalized = 1 + mantissa / two_in_52_pow;
+
+    printf("Result: %c%.52f*2^%d\n", sign, mantissaNormalized, exponent);
+
+    return 0;
+}