关于二维数组的东西[暂停]

I am a beginner in C and I am a Chinese. I want this code that can come to Matrix multiplication. To achieve this, I use two-dimensional array. But when I run the code and input matrices, the result of the multiplication is always strange. However, the code can manage to output the matrices I have input. So I suppose that the multiplication of two arrays' elements causes trouble. And thanks to goddess, when I try to output the multiplication of two arrays' elements, it truly comes to the same problem.I am a beginner in C and I am a Chinese. I want