ADD file via upload

Chen/CHEN_3.c

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+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#define SIZE 1024
+
+void matmul_optimized(float** A, float** B, float** C, int n);
+int main() {
+	int n = SIZE;
+
+	// 分配内存空间
+	float** A = (float**)malloc(sizeof(float*) * n);
+	float** B = (float**)malloc(sizeof(float*) * n);
+	float** C = (float**)malloc(sizeof(float*) * n);
+	int i, j;
+	for(i=0; i<n; i++) {
+		A[i] = (float*)malloc(sizeof(float) * n);
+		B[i] = (float*)malloc(sizeof(float) * n);
+		C[i] = (float*)malloc(sizeof(float) * n);
+	}
+	
+	// 随机化
+	srand(time(0));
+	for(i=0; i<n; i++)
+	for(j=0; j<n; j++) {
+		A[i][j] = rand() % 100;
+		B[i][j] = rand() % 100;
+	}
+
+	// 计算并计时
+	clock_t start = clock();
+	matmul_optimized(A, B, C, SIZE);
+	clock_t end = clock();
+	printf("初始向量乘法时间：%lf\n", (double)(end-start) / CLOCKS_PER_SEC);
+
+	// 释放内存空间
+	for(i=0; i<n; i++) {
+		free(A[i]);
+		free(B[i]);
+		free(C[i]);
+	}
+	free(A); free(B); free(C);
+}
+
+void matmul_optimized(float** A, float** B, float** C, int n) {
+	int i, j, k;
+	for(i=0; i<n; i++)
+	for(j=0; j<n; j++) {
+		C[i][j] = 0;
+		for(k=0; k<n; k++) {
+			C[i][j] = A[i][k] * B[k][j];
+		}
+	}
+}