The draw different numbers in the table, the sum of which is unknown in advance (Visual C++)

I want to draw the numbers in the table, the sum of which is equal to the sum previously proposed. The algorithm draws a different number when the sum is equal to the sum of the set.

#pragma endregion

private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {

}

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {

Close();

}

private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {

srand(time(NULL));

int size_table, range,sum_table;

int sum_temporary;

int i,k;

size_table=Int32::Parse(textBox1->Text);

range=Int32::Parse(textBox2->Text);

sum_table=Int32::Parse(textBox3->Text);

dataGridView1->ColumnCount=size_table;

dataGridView1->RowCount=1;

dataGridView1->Rows[0]->Height=70;

array<System::Int32>^ temporary_value=gcnew array<System::Int32>(range);

array<System::Int32>^ result_value=gcnew array<System::Int32>(size_table);

for(;;)

                {

                 for(i=0;i<range;i++) 

            temporary_value[i]=0;

            sum_temporary=0;

            i=0;

           do

           {

            do

           {

        k=rand()%range;

       }while(temporary_value[k]!=0);

      temporary_value[k]=1;

         result_value[i]=k;

     sum_temporary+=k;

    i++;

        }while(i<size_table);

       if(sum_temporary==sum_table)

      break;

      }

          for(i=0;i<size_table;i++)

 dataGridView1->Rows[0]->Cells[i]->Value=result_value[i].ToString();

 textBox4->Text=sum_table.ToString();

}

};

}