#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define SIZE 1024

// 矩阵乘法函数
void matmul(float A[SIZE][SIZE], float B[SIZE][SIZE], float C[SIZE][SIZE], int n) {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            C[i][j] = 0; 
            for (int k = 0; k < n; k++) {
                C[i][j] += A[i][k] * B[k][j];
            }
        }
    }
}

int main() {
    // 矩阵内存分配
    float *A = (float *)malloc(SIZE * SIZE * sizeof(float));
    float *B = (float *)malloc(SIZE * SIZE * sizeof(float));
    float *C = (float *)malloc(SIZE * SIZE * sizeof(float));

    if (A == NULL || B == NULL || C == NULL) {
        printf("Memory allocation failed!\n");
        return 1;
    }


    float (*A_matrix)[SIZE] = (float (*)[SIZE])A;
    float (*B_matrix)[SIZE] = (float (*)[SIZE])B;
    float (*C_matrix)[SIZE] = (float (*)[SIZE])C;

    // 初始化
    srand(time(NULL)); 
    for (int i = 0; i < SIZE; i++) {
        for (int j = 0; j < SIZE; j++) {
            A_matrix[i][j] = rand() % 100;
            B_matrix[i][j] = rand() % 100;
        }
    }

    // 计时并输出
    clock_t start, end;
    start = clock();

    matmul(*A_matrix, *B_matrix, *C_matrix, SIZE);

    end = clock(); 
    double time_spent = (double)(end - start) / CLOCKS_PER_SEC; 

    printf("基础矩阵乘法的运行时间为: %lf 秒\n", time_spent);

    
    free(A);
    free(B);
    free(C);

    return 0;
}