我试图定义“行”或1D向量的值,然后push_back将该行转换为二维向量。我已经尝试过几种不会抛出错误但不起作用的东西。下面的代码:Push_back一维向量行作为二维向量阵列
#include <vector>
#include <iostream>
using std::vector;
#define HEIGHT 5
#define WIDTH 3
// 2D VECTOR ARRAY EXAMPLE
int main() {
vector<vector<double> > array2D;
vector<double> currentRow;
// Set up sizes. (HEIGHT x WIDTH)
// 2D resize
array2D.resize(HEIGHT);
for (int i = 0; i < HEIGHT; ++i)
{
array2D[i].resize(WIDTH);
}
// Try putting some values in
array2D[1][2] = 6.0; // this works
array2D[2].push_back(45); // this value doesn't appear in vector output. Why?
// 1D resize
currentRow.resize(3);
// Insert values into row
currentRow[0] = 1;
currentRow[1] = 12.76;
currentRow[2] = 3;
// Push row into 2D array
array2D.push_back(currentRow); // this row doesn't appear in value output. Why?
// Output all values
for (int i = 0; i < HEIGHT; ++i)
{
for (int j = 0; j < WIDTH; ++j)
{
std::cout << array2D[i][j] << '\t';
}
std::cout << std::endl;
}
return 0;
}
显然我没有足够的信誉来upvote你。但是,谢谢! – ProGirlXOXO 2012-03-01 22:27:31