c++ - how to release struct pointer elements after push_back into the vector -

hi every 1 having issue insertion of struct stuct vector... please see following codes

struct stline { double** ptrroadcords; int isize; }; 

//i having struc , vector is

std::vector<stline> m_vecstline; 

//i creating temp struct

stline line;  line.ptrroadcords = new double*[cnt]; ( int = 1; < cnt-1; i++ ) {     line.ptrroadcords[i-1] = new double[2];     line.ptrroadcords[i-1][0] = ptrcords[i-1][0];     line.ptrroadcords[i-1][1] = ptrcords[i-1][1]; }  m_vecstline.push_back(line); 

//so working perfect causing meomory leaks

//so put releasing code

if (line.ptrroadcords != null) {    (int = 0; < cnt-2; i++)    {       delete[]line.ptrroadcords[i];    }    if(line.ptrroadcords)       delete[]line.ptrroadcords; } 

but because of application crashes because clears vector element because inserting refernce

please me resolve issue

thank u in advance