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#include<iostream.h>
int main(void)
{
    char st;
    int pay,a,b,c,d,e,f,g,h,i,j,k,input = 0;
    float z;
    bool replay = false;
    do {
        cout << "購物(1:購物 0:滾)？";
        cin >> st;
    } while(replay);
    cout<<"買";cin>>z;
    if(z>=900)
    z=z*0.8;
    else if (z>=500)
    z=z*0.9;
    else
    z=z*0.95;
    cout<<"應付金額"<<z<<endl;
    cout<<"付";cin>>pay;
    a=pay-(int)z;
    if (a<0)
    cout<<"錯誤 \n";
    else
    {
    b=a/500;c=a%500;
    d=c/100;e=c%100;
    f=e/50;g=e%50;
    h=g/10;i=g%10;
    j=i/5;k=i%5;
    cout<<"找零="<<a<<endl;
    cout<<"500*"<<b<<endl<<"100*"<<d<<endl<<"50*"<<f<<endl<<"10*"<<h<<endl
    <<"5*"<<j<<endl<<"1*"<<k<<endl;
}
    cin>>st;
}

prog.cpp:1:21: error: iostream.h: No such file or directory
prog.cpp: In function ‘int main()’:
prog.cpp:9: error: ‘cout’ was not declared in this scope
prog.cpp:10: error: ‘cin’ was not declared in this scope
prog.cpp:12: error: ‘cout’ was not declared in this scope
prog.cpp:12: error: ‘cin’ was not declared in this scope
prog.cpp:19: error: ‘endl’ was not declared in this scope
prog.cpp:5: warning: unused variable ‘input’

Standard output is empty