乘法竖式
#include<iostream>#include<iomanip>
using namespace std;
void yiwei()
{
int chengshu, beichengshu;
cout << "一位乘法(请从大到小输入）" << endl;
cin >> chengshu >> beichengshu;
system("cls");
cout << setw(7) << chengshu << endl;
cout << setw(1) << "×" << setw(5) << beichengshu << endl;
cout << setw(7) << "-------";
cout << endl;
cout<<setw(7)<< beichengshu * chengshu;
}
void erwei()
{
int chengshu, beichengshu;
cout << "两位乘法(请从大到小输入）" << endl;
cin >> chengshu >> beichengshu;
system("cls");
cout << setw(7) << chengshu << endl;
cout << setw(1) << "×" << setw(5) << beichengshu << endl;
cout << setw(7) << "-------";
cout << endl;
cout << setw(7) << chengshu * (beichengshu % 10) << endl;
if (beichengshu/10!=0)
{
cout << setw(6) << chengshu * (beichengshu / 10) << endl;
cout << setw(7) << "-------" << endl;
cout << setw(7) << beichengshu * chengshu;
}
}
void sanwei()
{
int chengshu, beichengshu,weishu;
cout << "3位乘法(请从大到小输入）" << endl;
cin >> chengshu >> beichengshu;
cout << "最小几位数？";
cin >> weishu;
system("cls");
switch (weishu)
{
case 1:cout << setw(7) << chengshu << endl;
cout << setw(1) << "×" << setw(5) << beichengshu << endl;
cout << setw(7) << "-------";
cout << endl;
cout << setw(7) << beichengshu * chengshu;
; break;
case 2:cout << setw(7) << chengshu << endl;
cout << setw(1) << "×" << setw(5) << beichengshu << endl;
cout << setw(7) << "-------";
cout << endl;
cout << setw(7) << chengshu * (beichengshu % 10) << endl;
cout << setw(7) << chengshu * (beichengshu / 10) << endl;
cout << "-------";
cout << endl;
cout << beichengshu * chengshu;
break;
case 4:NULL;cout<<"你大爷的";
default:cout << setw(7) << chengshu << endl;
cout << setw(1) << "×" << setw(5) << beichengshu << endl;
cout << setw(7) << "-------";
cout << endl;
cout << setw(7) << chengshu * (beichengshu % 10) << endl;
cout << setw(7) << chengshu * ((beichengshu % 100)/10) << endl;
cout << setw(7) << chengshu * (beichengshu / 100) << endl;
cout << setw(7) << "-------" << endl;
cout << setw(7) << beichengshu * chengshu;
break;
}
}
int main()
{
short i;
cout << "最大几位数(1~3）？";
cin >> i;
switch (i)
{
case 1:yiwei();return 0; break;
case 2:erwei();return 0; break;
case 3:sanwei(); return 0; break;
default:
break;
}
while (true)
{
}
}
