Asked when a greater than 300, a number of * 0.9
When a is less than or equal to 300, direct display a certain number of
At the end of the reserved 2 decimal places

CodePudding user response:

 
If (300 & lt; A) 
{
A1=a * 0.9; 
cout } 
If (300 & gt; 
=a){
A2=a; 
cout }