Tools/materials: Lenovo Xiao Xin air 14 computer, windows 10 system, Visualstudio20 10 version.

1. In C language, you can use abs or fabs function to obtain the absolute value of a number, which is contained in the math.h header file, so add the header file to the code first.

2. If it is an integer, you can use abs function to find its absolute value.

3. If it is a floating-point number, its absolute value can be obtained by fabs function.

4. Finally, you can use the Printf function to print out the numbers converted into absolute values and check the running results of the code.

5. Debug and run the code, and you can see the result after the numbers are converted into absolute values.