Flash back after vs compiler running, processing method

How to solve the problem of flash back!!!!!!
I habitually deal with this problem in three ways
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1, system (” pause “);
2, getchar ();
3, Ctrl + F5
Let’s discuss the pros and cons of each separately: Welcome to the land of the Kings
System (” pause “) : need to include the preprocessing header #include< stdlib.h> ||#include< windows.h>
Usage: put return (); Before the return statement, otherwise there is no meaning
Advantages: solve the flashback problem, small side effects
Disadvantages: call system function, large memory overhead

Getchar () :

Usage: put return (); Before the return statement, otherwise there is no meaning
Advantages: low overhead, receive a character to end the program
Cons: Use it on a case-by-case basis, because getchar (); You need to accept a string to represent the end, and some functions explicitly need to accept a string as the return value, if you use getchar (); To solve the flashback problem, which can be confusing and introduce errors when the program is running.
can see, although can solve the running results of the flashback problem, but in the processing is completely different, although in the operation is also approximately the same, but in the memory, CPU and other levels, overhead is sometimes different, so you can choose according to your preferences for a way for you !!!!! System (” pause “) is recommended; This way, the introduction and processing of files is also more careful, if there is a heavy use of system functionality is, of course. windows.h> #include< stdlib.h> Of course, it is suitable for those who use a lot of library functions

 


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