Some help please for a rookie

Question

I wrote a program to calculate tip amount on a bill where you input the bill amount and input the percentage you want to tip. Low and behold i got it to work,however, say I input bill amout of $97 and tip percentage of 20% the outcome is $19.4. How do i make it return $19.40?

Here is my code:

#include <iostream>
using namespace std;
/* I am at best a rookie at this. if someone can help me to figure out how to make a second decimal place after the decimal even if its 0 i would appreciate it. For example: Tip:$19.40 instead of Tip:$19.4 thank you.*/

int main() {

float a;
float b;
float c;
cin>>a;//enter bill amount//
cin>>b;//enter tip percentage//
c=a*(b/100);

cout<<"Your bill:

Answer 1

hey ! Why dont u try this -
cout<<"tip amount:"<<c<<"0"<<endl ;
I m nt sure bt maybe it works .
Try it out !

Answer 2

Thank you for the reply!
That would work for some but not all instances.
For example:
If the output would be 19.4 that would change it to 19.40 like I want;
If the output would be 33.33 that would change it to 33.330 which i wouldnt want.

Ive done a little research and I am going to try to add in a couple lines to see if it works:

Cout<<std::fixed;
Cout<<std::setprecision(2);