有人会么 - 编程论坛

#2

hgchenkv2008-04-02 09:49

给你个程序，运用这个算法根据ASCII表if&else if&else下就可以了，
/*
a转换为A
b转换为B
*/

#include<iostream.h>
class Sample
{
    char c1,c2;
public:
    Sample(char a){c2=(c1=a)-32;}
    void disp()
    {
        cout<<c1<<"转换为"<<c2<<endl;
    }
};

void main()
{
    Sample a('a'),b('b');
    a.disp();
    b.disp();
}

#3

newyj2008-04-02 13:21

#include<iostream>
#include<cctype>
using namespace std;

int main(){
  char str='0';
  cin>>str;
  if(isupper(str))
    cout<<"The source key is: "<<str<<"，after converting is: "<<static_cast<char>(tolower(str))<<endl;
  else if(islower(str))
    cout<<"The source key is: "<<str<<"，after converting is: "<<static_cast<char>(toupper(str))<<endl;
  else if(isdigit(str))
    cout<<"The source key is: "<<str<<"，after converting is: "<<hex<<str<<endl;
  else
    cout<<"Control  key";
  system("pause");
  return 0;
}
输出toupper(str)时为什么是int型的
还必须得强制转换啊

#4

张信哲2008-04-13 21:42

hangtian 真可爱