gcc undefined reference to oepration new[]

include

using namespace std;
char * getStyle(int a)
{
char *result = new char[5];
for (int i = 0; i < 5; ++i)
{
result[i] = ‘0’;
}
int count = 4;
while(a >= 1)
{
int rem = a % 10;
result[count–] = rem+’0’;
a-=rem;
a/=10;
}
return result;
}
int main()
{
int a = 1;
cout<