Question

c++中list的指针问题？

我怎么输出了一窜数字啊？
#include <list>
#include <iostream>
using namespace std;
int main()
{
list<char> coll;
for(char i = 'a';i<='z';++i)
coll.push_back(i);
list<char>::iterator pos;

/*while(!coll.empty())
{
cout<<coll.front();
coll.pop_front();
} */
for(pos = coll.begin();pos!=coll.end();++pos)
{cout<<toupper(*pos);
}
cin.get();
return 1;
}

Answer 1

#include <list>
#include <iostream>
using namespace std;
int main()
{
list<char> coll;
for(char i = 'a';i<='z';++i)
coll.push_back(i);
list<char>::iterator pos;

/*while(!coll.empty())
{
cout<<coll.front();
coll.pop_front();
} */
for(pos = coll.begin();pos!=coll.end();++pos)
{cout<<(char)toupper(*pos); //toupper的返回值是int类型，直接输出就成数字了
}
cin.get();
return 1;
}