MyInt

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#include <iostream>using namespace std;class MyInt { int nVal; public: MyInt( int n) { nVal = n ;} int ReturnVal() { return nVal;}     MyInt& operator - (int a){this->nVal -= a;return * this;}}; int main ()  { MyInt objInt(10); objInt - 2 - 1 - 3; cout << objInt.ReturnVal(); cout <<","; objInt - 2 - 1; cout << objInt.ReturnVal(); return 0;}