C / C++ / MFC

void CleanUpWord (char *pszWord)
{
    char *pszIn = pszWord;
    char *pszOut = pszWord;
    char c;
    while ((c = *pszIn++) != 0)
    {
        if (!ispunct (c))
            *pszOut++ = tolower (c);
    }
    *pszOut++;
}

CString str("This is a test.");
int n = str.Remove('t');
ASSERT(n == 2);
ASSERT(str == "This is a es.");

string remove(const string& src,const string& chars)
{
  string dst;
  for(string::size_type off=0,off2=0;(off=src.find_first_of(chars,off2))!=string::npos; ){
    off2=src.find_first_not_of(src,off);
    dst+=src.substr(off,off2==string::npos?string::npos:off2-off);
  }
  return dst;
}

cin >> size;

//allocate space for your array.
int *arrayvalue = new int[size];
// it is a good idea to check the return value from a call to new.
// the return value from new is NULL of the memory allocation fails.
if (NULL == arrayvalue)
{
  // handler this error here.
}
else
{
  // use your array like you would any other array.
  arrayvalue[0] = 100;
  ...

  //free the memory for your array later with this call.
  delete[] arrayvalue;
}

#include <vector>
std::vector<int> v;
int size;
cin >> size;
v.resize(size);

int g_Temp;

extern int g_Temp;