[embedded C foundation] Part 7: detailed introduction to C language process control

1 Sequential structure

Program -> main The first sentence of the function begins -> Execute to main End of the function

The program is executed down in sequence

2 Branch statement

2.1 if Branch

use if Branch , The same type of data wants to execute different code using if Branch

 Three types of :
1、 Simple branches :

if (A)
{ 
    
	B;
}
else
{ 
    
	C;
}

Be careful :
1.if Able to disengage else Use alone , but else Can't get away from if Use alone
2.if After can add judgment conditions ,else No judgment conditions can be added after
3. If you don't enlarge the parentheses ,if It can control a statement block by default , But in the project if No matter how many sentences of code you control, you need to add parentheses

practice :
Input two numbers from the terminal to a and b, Compare ab Value , If a > b Direct output a, If a No more than b take ab Output after exchange a.