Shulou(Shulou.com)06/02 Report--

This article mainly explains "what problems should be paid attention to when using system functions in C++", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn what problems you should pay attention to when using system functions in C++.

We know that functions must be defined or explained before they can be used in programs. System functions are divided into several categories according to their functions, and each category has a header file, in which the prototype of each function of this class is given. Therefore, we only need to embed the corresponding header file using # include instruction in the program, instead of directly explaining the prototype of the function in the program.

The manual explains which header file should be embedded when using a function. For example, to calculate the square root of a number in the program, a corresponding function has been provided in the C + 10 system library. In the manual, the function description is:

# include # include void main () {float f; cout > f; cout

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