resizing a 2D vector of structs

[Anviori]

Hello, I'm working on making a minesweeper game using C++ but I'm having trouble re sizing a vector.

Here's what I have:
A vector of ints:

 vector<vector<int> > mineField;

A vector of structs:

struct cell{
         int value;                //(-1 mine, 0 no surrounding, # > 0 number of surrounding mines)
         int state;		       //( 0 hidden, 1 revealed, 2 marked) 
         bool isMine;
    };
    
    vector<vector<cell> > mineField;

The vector of cell is located in a separate .cpp file of a minesweeper class.
What I want to do is re size the vector of cell to have the same dimensions as the vector of ints.
and initialize the struct variable *value* to the values in the vector of ints and the struct
variable *state* to 0.

This is what I have tried so far:

this->mineField.resize(rowNum, vector<cell>(colNum));
        
        for(int i = 0; i < rowNum; i++){
            for(int j = 0; j < colNum; j++){
                
                this->mineField[i][j].state = 0;
                    
                this->mineField[i][j].value = mineField[i][j];
            }
        }

When attempt to run this I am only able to have the dimensions 5 rows x 5 columns (I cannot figure out why). Any
other dimensions exits the program and netbeans tells me the run has failed.

I have also tried:

this->mineField.clear();
        for (int i = 0; i < rowNum; i++){
            
            this->mineField.push_back(vector<cell>(colNum, 0));
        
        }
        
        for(int i = 0; i < rowNum; i++){
            for(int j = 0; j < colNum; j++){
                
                this->mineField[i][j].state = 0;
                    
                this->mineField[i][j].value = mineField[i][j];
            } 
        }

When trying to resize this way, nothing works.

And this way:

this->mineField.resize(rowNum);
        
        for(int i = 0; i < rowNum; i++){
            
            this->mineField[i].resize(colNum);
            
        }
        
        for(int i = 0; i < rowNum; i++){
            for(int j = 0; j < colNum; j++){
                
                this->mineField[i][j].state = 0;
                    
                this->mineField[i][j].value = mineField[i][j];
            } 
        }

Attempting this lets the program run but doesn't work for any dimensions combination.

Any help is greatly appreciated, thank you.

[2kaud]

this->mineField[i][j].value = mineField[i][j];

What is this->mineField[] as opposed to mineField[] ?

[humptydumpty]

Why not simply create a new one and copy the content of old vector to new and then free the old vector . Any internally resize is also going to do this only.