C++ 如何使用断言对阵列进行测试?
我正在尝试为一个程序编写一个测试,该程序将矩阵C++ 如何使用断言对阵列进行测试?,c++,algorithm,matrix,C++,Algorithm,Matrix,我正在尝试为一个程序编写一个测试,该程序将矩阵a和X的乘积添加到矩阵Y。 但我得到了一个错误: "Identifier is required" 我无法解决或找到解决这个问题的方法,所以我在这里寻求帮助 起初,我认为问题在于我将它与错误的数组进行了比较。然后我试着传递其他论点。将我的代码分解成几个函数。但还是什么也没发生 #include<iostream> #include<cassert> using namespace std; void axpy(int n
a
和X
的乘积添加到矩阵Y
。
但我得到了一个错误:
"Identifier is required"
我无法解决或找到解决这个问题的方法,所以我在这里寻求帮助
起初,我认为问题在于我将它与错误的数组进行了比较。然后我试着传递其他论点。将我的代码分解成几个函数。但还是什么也没发生
#include<iostream>
#include<cassert>
using namespace std;
void axpy(int n, int m, int k, int **A, int **X, int **Y)
{
int i, j, q;
for (i = 0; i < n; i++)
{
for (j = 0; j < m; j++)
{
for (q = 0; q < k; q++)
{
Y[i][j] += A[i][q] * X[q][j];
}
}
}
cout << "Product of matrices\n";
for (i = 0; i < n; i++)
{
for (j = 0; j < m; j++)
cout << Y[i][j] << " ";
cout << "\n";
}
}
void TestAxpy()
{
int P[2][2] = { {13,11},{27,21} };
assert(axpy(2,2,2,[1,2][3,4],[4,3][2,1],[5,6][7,8]) == P);
}
int main()
{
int n, m, k, i, j, q;
cout << "Enter number of rows of matrix X and columns of matrix A: ";
cin >> k;
cout << "Enter number of rows of matrix A and Y: ";
cin >> n;
cout << "Enter number of columns of matrix X and Y: ";
cin >> m;
int **A = new int *[k];
for (i = 0; i < k; i++)
A[i] = new int[n];
int **X = new int *[m];
for (i = 0; i < m; i++)
X[i] = new int[k];
int **Y = new int *[m];
for (i = 0; i < m; i++)
Y[i] = new int[n];
cout << "Enter elements of matrix A: ";
for (i = 0; i < n; i++)
for (j = 0; j < k; j++)
cin >> A[i][j];
cout << "Enter elements of matrix X: ";
for (i = 0; i < k; i++)
for (j = 0; j < m; j++)
cin >> X[i][j];
cout << "Enter elements of matrix Y: ";
for (i = 0; i < n; i++)
for (j = 0; j < m; j++)
cin >> Y[i][j];
axpy(n, m, k, A, X, Y);
TestAxpy();
system("pause");
return 0;
}
<>这似乎是C和C++的混合体。在C++中,你需要使用原始的“C”数组,几乎总是<代码> STD::vector < /COD>或<代码> STD::数组< /C> >将是更好的选择。boost库中还有一个矩阵,它可以准确地存储您需要的内容 就您的特定代码而言,有两个问题:
axpy(2,2,2[1,2][3,4],[4,3][2,1],[5,6][7,8])
毫无意义。我甚至猜不出这是什么意思。通常情况下:指针不是数组。数组不是指针。new
newnewnewnewnewnew-std::vector
是你的朋友
Enter number of rows of matrix X and columns of matrix A: 2
Enter number of rows of matrix A and Y: 2
Enter number of columns of matrix X and Y: 2
Enter elements of matrix A: 1 2 3 4
Enter elements of matrix X: 4 3 2 1
Enter elements of matrix Y: 5 6 7 8
void TestAxpy()
{
int P[2][2] = { {13,11},{27,21} };
int A1[2] = {1,2};
int A2[2] = {3,4};
int* A[2] = { A1, A2 };
int X1[2] = {4,3};
int X2[2] = {2,1};
int *X[2] = { X1, X2 };
int Y1[2];
int Y2[2];
int *Y[2] = {Y1, Y2 };
axpy(2,2,2,A,X,Y);
//assert(Y == P); //C++ doesn't know how to do this.
}