#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

int increaseSignal(int value);
int decreaseSignal(int value);

TEST_CASE("increaseSignal doubles the value using left shift", "[increaseSignal]") {
    REQUIRE(increaseSignal(4) == 8);    // 4 << 1 = 8
    REQUIRE(increaseSignal(7) == 14);   // 7 << 1 = 14
    REQUIRE(increaseSignal(0) == 0);    // 0 << 1 = 0
    REQUIRE(increaseSignal(1) == 2);    // 1 << 1 = 2
}

TEST_CASE("decreaseSignal halves the value using right shift (integer division)", "[decreaseSignal]") {
    REQUIRE(decreaseSignal(10) == 5);   // 10 >> 1 = 5
    REQUIRE(decreaseSignal(3) == 1);    // 3 >> 1 = 1
    REQUIRE(decreaseSignal(1) == 0);    // 1 >> 1 = 0
    REQUIRE(decreaseSignal(0) == 0);    // 0 >> 1 = 0
}

test.cpp

Learn how C works at the bit level. This course explains bitwise operators, masks, flags, shifts, and binary data manipulation, helping you write efficient, low-level, and predictable C code.

Explore how binary numbers underpin C programming, including integer storage, signed vs unsigned types, and two’s complement.

Master the use of bitwise operators and shifting for manipulating binary data in C.

Learn to create, combine, and use bit masks and flags for efficient state encoding and manipulation.

Delve into advanced bit manipulation: packing/unpacking, bit rotations, and using bit fields in C structures.

Challenge: Signal

Solution