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int a*;

a = malloc(3*sizeof(int)); a[0]=1; a[1]=2; a[2]=3; M = cv::Mat(3,1,CV_32S , a);

cout<< "correct answer:"<<endl; cout="" &lt;&lt;="" m="" &lt;&lt;="" endl;="" free(a);="" cout&lt;&lt;"problem:"&lt;<endl;="" cout&lt;<m&lt;<endl;<="" p="">

This program results to: correct answer: [1; 2; 3] problem: [4; 0; 24411984]

WHY??????

int a*;
  
a = malloc(3*sizeof(int));
a[0]=1; a[1]=2; a[2]=3;
M = cv::Mat(3,1,CV_32S , a);a);
  
cout<< "correct answer:"<<endl; cout="" &lt;&lt;="" m="" &lt;&lt;="" endl;="" free(a);="" cout&lt;&lt;"problem:"&lt;<endl;="" cout&lt;<m&lt;<endl;<="" p="">
answer:"<<endl;
cout << M << endl;
free(a);
cout<<"problem:"<<endl;
 
cout<<M<<endl;

This program results to:
correct answer:
[1;
2;
 3]
problem:
[4;
0;
 24411984]24411984]

WHY??????`

int a*;

a = malloc(3*sizeof(int));
a[0]=1; a[1]=2; a[2]=3;
M = cv::Mat(3,1,CV_32S , a);

cout<< "correct answer:"<<endl;
cout << M << endl;
free(a);
cout<<"problem:"<<endl;

cout<<M<<endl;

3]
problem:
[4;
0;
 24411984]

int a*;

a = malloc(3*sizeof(int));
a[0]=1; a[1]=2; a[2]=3;
M = cv::Mat(3,1,CV_32S , a);

cout<< "correct answer:"<<endl;
cout << M << endl;
free(a);
cout<<"problem:"<<endl;

cout<<M<<endl;

This program results to: correct answer: [1; 2;to:

correct answer:
[1;
2;

3]
problem:
[4;
0;
 24411984]

WHY??????`

int a*;

a = malloc(3*sizeof(int));
a[0]=1; a[1]=2; a[2]=3;
M = cv::Mat(3,1,CV_32S , a);

cout<< "correct answer:"<<endl;
cout << M << endl;
free(a);
cout<<"problem:"<<endl;

cout<<M<<endl;

This program results to:

correct answer:
[1;
2;
 3]
problem:
[4;
0;
 24411984]

WHY??????`