diff --git a/7/CMakeLists.txt b/7/CMakeLists.txt
new file mode 100644
index 0000000..362bb8d
--- /dev/null
+++ b/7/CMakeLists.txt
@@ -0,0 +1,10 @@
+# Устанавливаем минимальную версию CMake
+cmake_minimum_required(VERSION 3.25)
+# Указываем название проекта и используемый язык(и)
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+project(Bit C)
+
+# Указываем исполняемый файл
+add_executable(Bit bit.c)
diff --git a/7/bit.c b/7/bit.c
new file mode 100644
index 0000000..b87dc84
--- /dev/null
+++ b/7/bit.c
@@ -0,0 +1,137 @@
+#include "bit.h"
+
+void copyArr(char arr1[], char arr2[], int n)
+{
+    for (int i = 0; i < n; i++) {
+        arr1[i] = arr2[i];
+    }
+}
+
+void decToBin(int num, char bin[])
+{
+    int temp = num;
+    if (temp < 0) {
+        temp = -temp;
+    }
+
+    for (int i = BITS - 1; i >= 0; i--) {
+        bin[i] = (char)(temp % 2) + '0';
+        temp = temp / 2;
+    }
+}
+
+void invert(char bin[])
+{
+    for (int i = 0; i < BITS; i++) {
+        bin[i] = (bin[i] == '0') ? '1' : '0';
+    }
+}
+
+void addInBin(char a[], char b[], char result[])
+{
+    int carry = 0;
+
+    for (int i = BITS - 1; i >= 0; i--) {
+        int bitA = (int)a[i] - '0';
+        int bitB = (int)b[i] - '0';
+
+        int sum = bitA + bitB + carry;
+
+        result[i] = (char)(sum % 2) + '0';
+        carry = sum / 2;
+    }
+}
+
+int binToDec(char bin[])
+{
+    if (bin[0] == '0') {
+        int result = 0;
+        for (int i = 0; i < BITS; i++) {
+            result = result * 2 + (bin[i] - '0');
+        }
+        return result;
+    } else {
+        char minusOne[BITS] = { '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1' };
+
+        char result[BITS] = { '0' };
+        addInBin(bin, minusOne, result);
+
+        invert(result);
+
+        int res = 0;
+        for (int i = 0; i < BITS; i++) {
+            res = res * 2 + (bin[i] - '0');
+        }
+        return res;
+    }
+}
+
+void printBinary(char bin[])
+{
+    for (int i = 0; i < BITS; i++) {
+        printf("%c", bin[i]);
+    }
+    printf("\n");
+}
+
+int main()
+{
+    int a, b;
+    printf("Введите два числа (Integer):\n");
+    printf("Первое число: ");
+    scanf("%d", &a);
+    printf("Второе число: ");
+    scanf("%d", &b);
+
+    char binA[32] = { '0' };
+    char binB[32] = { '0' };
+
+    decToBin(a, binA);
+    decToBin(b, binB);
+
+    if (a < 0) {
+        invert(binA);
+
+        char one[BITS] = { '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1' };
+        one[BITS - 1] = '1';
+
+        char result[BITS] = { '0' };
+        addInBin(binA, one, result);
+
+        copyArr(binA, result, BITS);
+    }
+
+    if (b < 0) {
+        invert(binB);
+
+        char one[BITS] = { '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1' };
+
+        printBinary(one);
+
+        char result[BITS] = { '0' };
+        addInBin(binB, one, result);
+
+        copyArr(binB, result, BITS);
+    }
+
+    printf("\nДвоичное\n");
+    printf("Число %d: ", a);
+    printBinary(binA);
+
+    printf("Число %d: ", b);
+    printBinary(binB);
+
+    char binSum[BITS] = { '0' };
+    addInBin(binA, binB, binSum);
+
+    printf("\nСумма в двоичном\n");
+    printBinary(binSum);
+
+    int sumDecimal = binToDec(binSum);
+
+    printf("\nСумма в десятичной\n");
+
+    printf("%d\n", sumDecimal);
+
+    return 0;
+}
diff --git a/7/bit.h b/7/bit.h
new file mode 100644
index 0000000..2bfff33
--- /dev/null
+++ b/7/bit.h
@@ -0,0 +1,11 @@
+#pragma once
+#include <stdio.h>
+
+#define BITS 32
+
+void copyArr(char arr1[], char arr2[], int n);
+void decToBin(int num, char bin[]);
+void invert(char bin[]);
+void addInBin(char a[], char b[], char result[]);
+int binToDec(char bin[]);
+void printBinary(char bin[]);