Hi,

I have a C++ program :

```
// ConsoleApplication14.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
#include <list>
#include <queue>
#include <vector>
#include <string>
using namespace std;
class RectangularVectors
{
public:
static std::vector<std::vector<int>> ReturnRectangularIntVector(int size1, int size2)
{
std::vector<std::vector<int>> newVector(size1);
for (int vector1 = 0; vector1 < size1; vector1++)
{
newVector[vector1] = std::vector<int>(size2);
}
return newVector;
}
static std::vector<std::vector<bool>> ReturnRectangularBoolVector(int size1, int size2)
{
std::vector<std::vector<bool>> newVector(size1);
for (int vector1 = 0; vector1 < size1; vector1++)
{
newVector[vector1] = std::vector<bool>(size2);
}
return newVector;
}
};
class Cell {
public:
int x;
int y;
int dis;
Cell(int x, int y, int dis); // This is the constructor
};
// Member functions definitions including constructor
Cell::Cell(int x, int y, int dis) {
this->x = x;
this->y = y;
this->dis = dis;
}
int minStepToReachTarget(std::vector<int> knightPos, std::vector<int> targetPos, int N, int M);
int main()
{
int n, m, r, c;
cout << "Enter the number of rows : ";
cin >> n;
cout << "Enter the number of cells : ";
cin >> m;
cout << "Enter the number of knight position row : ";
cin >> r;
cout << "Enter the number of knight position cell : ";
cin >> c;
std::vector<std::vector<int>> Moves = RectangularVectors::ReturnRectangularIntVector(n, m);
std::vector<int> knightPos = { r - 1, c - 1 };
for (int i = 0; i < n; i++)
{
for (int j = 0; j < m; j++)
{
std::vector<int> targetPos = { i, j };
Moves[i][j] = minStepToReachTarget(knightPos, targetPos, n, m);
}
}
for (int i = 0; i < n; i++)
{
for (int j = 0; j < m; j++)
{
std::wcout << std::to_wstring(Moves[i][j]) << L" ";
}
}
int test;
cin >> test;
}
bool isInside(int x, int y, int N, int M)
{
if (x >= 0 && x <= N && y >= 0 && y <= M)
return true;
return false;
}
int minStepToReachTarget(std::vector<int> knightPos, std::vector<int> targetPos, int N, int M)
{
// x and y direction, where a knight can move
int dx[] = { -2, -1, 1, 2, -2, -1, 1, 2 };
int dy[] = { -1, -2, -2, -1, 1, 2, 2, 1 };
// queue for storing states of knight in board
queue<Cell> q;
// push starting position of knight with 0 distance
q.push(Cell(knightPos[0], knightPos[1], 0));
Cell t = Cell(0,0,0);
int x, y;
const int N2 = N;
const int M2 = M;
std::vector<std::vector<bool>> visit = RectangularVectors::ReturnRectangularBoolVector(N + 1, M + 1);
// make all cell unvisited
for (int i = 0; i < N; i++)
{
for (int j = 0; j < M; j++)
{
visit[i][j] = false;
}
}
// visit starting state
visit[knightPos[0]][knightPos[1]] = true;
// loop untill we have one element in queue
while (!q.empty())
{
t = q.front();
q.pop();
// if current cell is equal to target cell,
// return its distance
if (t.x == targetPos[0] && t.y == targetPos[1])
return t.dis;
// loop for all reachable states
for (int i = 0; i < 8; i++)
{
x = t.x + dx[i];
y = t.y + dy[i];
// If reachable state is not yet visited and
// inside board, push that state into queue
if (isInside(x, y, N, M) && !visit[x][y])
{
visit[x][y] = true;
q.push(Cell(x, y, t.dis + 1));
}
}
}
return 0;
}
```

And I just want to convert it to C language.

please help me.