问题，不懂
#include<iostream>using namespace std;
void (*p[5])(int&,int&);
void square(float&x,float&y){x=x*x;y=y*y;}
void cube(float&x,float&y){x=x*x*x;y=y*y*y;}
void printf(float&x,float&y){cout<<"长:"<<x<<"\t"<<"宽:"<<y<<endl;}
void Swap(float&x,float&y){int z;z=x;x=y;y=z;}
int main()
{
float a=2,b=3;
char choice='0';
int i;
void (*p[5])(float&x,float&y);
for(i=0;i<5;i++)
{
cout<<"(0)退出(1)平方(2)立方(3)交换x和y的值：";
cin>>choice;
bool quit=false;
switch (choice)
{
case'0':quit=true;
break;
case'1':p[i]=square;
break;
case'2':p[i]=cube;
break;
case'3':p[i]=Swap;
break;
default:p[i]=0;
}
if(quit)break;
if(p[i]==0)
{
cout<<"请输入一个从0到3之间的数字\n";
i=i-1;
continue;
}
cout<<"第<<i+1<<次执行,到第5次结束\n";
cout<<"初始值\n";
print(a,b);
cout<<"现在调用函数指针数组p["<<i<<"]所指向的函数...\n";
p[i](a,b);
cout<<"运算后\n";
print(a,b);
}
return 0;
}
一个错误，哪错误了呢
