unsigned __int64

C Language Experience Discussion (Part 4): Is char Signed or Unsigned?

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C Language Experience Discussion (Part 4): Is char Signed or Unsigned?

C Language Experience Discussion (Part 4): Is char Signed or Unsigned? 📌 Application Scenarios and Issues The C language standard specifies that the <span>char</span> type can be either signed or unsigned, depending on the implementation of the compiler and platform. This uncertainty can lead to subtle but serious errors when handling extended ASCII characters, determining … Read more

C++ Development Basics: Why Subtracting Two unsigned __int64 Values Does Not Yield the Expected Result?

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C++ Development Basics: Why Subtracting Two unsigned __int64 Values Does Not Yield the Expected Result?

Introduction In daily C++ development, especially when dealing with data that requires a large range of values, such as timestamps and counters, we often use <span>unsigned __int64</span> (also known as <span>uint64_t</span> in the standard library). However, many people may be surprised by the result when they first encounter its subtraction operation. Let’s look at an … Read more