In the last lesson, we discussed the float data type, which seems like a simple variable type but actually hides many “mysteries”. Its declaration methods are diverse, and the output results are often unexpected. Today, we will delve into how to use float correctly and unveil the mysterious veil of “precision loss” that may occur … Read more
In learning C language, float (single precision floating point) and double (double precision floating point) are two unavoidable hurdles. Many students memorize their value ranges—such as float being approximately ±3.4E+38—but do not understand where this astronomical number comes from. Today’s lesson is an “elective content,” but it is highly valuable. We will dive into the … Read more
“From today on, study hard and make progress every day” Repetition is the best method for memory; spend one minute every day to remember the basics of C language. “Series of 100 Essential Knowledge Points for C Language Beginners“ 9. Differences Between Float and Double 1. Overview of Floating Point Types The floating point type … Read more
The toolchain version I am using is arm-gnu-toolchain-12.3.rel1-x86_64-arm-none-eabi and it is necessary to add the following to the linker parameters: -u_printf_float Otherwise, when using “%f”, the output will be an empty string. Please open in the WeChat client.