Program Body:

#include <iostream>

#include <string>

using namespace std;

class damon{

int a;

public:

damon(){

a=0;

}

damon(int b){

a=b;

}

void operator-=(int wolf){

a=a-wolf;

}

void depict(){

cout<<a<<endl;

}

};

int main (){

damon vamp(80);

vamp-=10;

vamp.depict();

return 0;

}

Working:

the object of class is Subtracted it is for single one.

Thanks I hope you liked it

https://steemitimages.com/0x0/http://i.imgur.com/8LLIFX6.gif

https://steemitimages.com/DQmWjQo9ddXyVHLTJ2tFirEb1hUVJjnBf7RLVrVUzwkiRyt/coollogo_com-27655818.png