diff --git a/算子优化系统3.cpp b/算子优化系统3.cpp
new file mode 100644
index 0000000..0161e44
--- /dev/null
+++ b/算子优化系统3.cpp
@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctime>
+#define SIZE 1024
+void matmul(float** A, float** B, float** C, int n) {
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            float sum = 0;
+            for (int k = 0; k < n; k++) {
+                sum += A[i][k] * B[k][j];}
+            C[i][j] = sum;}
+    }
+}
+int main() {
+    float** A = (float**)malloc(SIZE * sizeof(float*));
+    for (int i = 0; i < SIZE; i++) {
+        A[i] = (float*)malloc(SIZE * sizeof(float));
+    }
+    float** B = (float**)malloc(SIZE * sizeof(float*));
+    for (int i = 0; i < SIZE; i++) {
+        B[i] = (float*)malloc(SIZE * sizeof(float));
+    }
+    float** C = (float**)malloc(SIZE * sizeof(float*));
+    for (int i = 0; i < SIZE; i++) {
+        C[i] = (float*)malloc(SIZE * sizeof(float));
+    }
+    for (int i = 0; i < SIZE; i++) {
+        for (int j = 0; j < SIZE; j++) {
+            A[i][j] = (float)(rand() % 100);
+            B[i][j] = (float)(rand() % 100);
+        }
+    }
+    clock_t start_time = clock();
+    matmul(A, B, C, SIZE);
+    clock_t end_time = clock();
+    double elapsed_time = (double)(end_time - start_time) / CLOCKS_PER_SEC;
+    printf("time: %lf s\n", elapsed_time);
+    for (int i = 0; i < SIZE; i++) {
+        free(A[i]);}
+    free(A);
+    for (int i = 0; i < SIZE; i++) {
+        free(B[i]);}
+    free(B);
+    for (int i = 0; i < SIZE; i++) {
+        free(C[i]);}
+    free(C);
+    return 0;
+}
\ No newline at end of file