elements from array to string

[Sieves]

i have a multidimensional array of character type numbers separated by X's i want to go through the array and store each group of numbers in between the X's as strings but i don't know how to go about this

for(i=0;i<G.getHeight();i++)
	{
		for(j=0;j<G.getWidth();j++)
		{
			if (G.at(i,j)!= 'X')
			{
				temp[j]=G.at(i,j);
			}
			if (G.at(i,j)== 'X')
				break;
		}//inner for
		if (temp.size()>= Sizes[0] && temp.size()<=Sizes[K])
			list.insert(temp);
	}//outter for 

temp is type string and this trips the assertion in the string class is there some way i can circumvent the assertion statement?

[Sieves]

now i am trying this

for(i=0;i<G.getHeight();i++)
	{
		for(j=0;j<G.getWidth();j++)
		{
			if (G.at(i,j)!= 'X')
			{
				temp.insert(G.at(i,j));
			}
			if (G.at(i,j)== 'X')
				break;
		}//inner for
		if (temp.size()>= Sizes[0] && temp.size()<=Sizes[K])
			list.insert(temp);
	}//outter for 

this makes much more sense to me but it is still not working i get an error called

Error 1 error C2664: 'std::_String_iterator<_Elem,_Traits,_Alloc> std::basic_string<_Elem,_Traits,_Ax>::insert(std::_String_const_iterator<_Elem,_Traits,_Alloc>)' : cannot convert parameter 1 from 'char' to 'std::_String_const_iterator<_Elem,_Traits,_Alloc>' c:\users\tyler\documents\visual studio 2010\projects\cs150_program_3\cs150_program_3\grid_driver.cpp 119 1 cs150_Program_3