add

public/c/ch2/juzhen/juzhenold.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#define SIZE 3 // 矩阵的大小
+int main() {
+    // 初始化矩阵
+    int matrix1[SIZE][SIZE] = { { 1, 2, 3 }, { 3, 4, 5 }, { 3, 4, 5 } };
+    int matrix2[SIZE][SIZE] = { { 4, 5, 6 }, { 6, 7, 8 }, { 6, 7, 8 } };
+    int result[SIZE][SIZE] = { { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } };
+    int n = SIZE;    int count = 0;
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            result[i][j] = 0;
+            for (int k = 0; k < n; k++) {
+                result[i][j] += matrix1[i][k] * matrix2[k][j];
+                count++;
+            }
+        }
+    }
+    // 输出结果
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            printf("%d ", result[i][j]);
+        }
+        printf("\n");
+    }
+    printf("N: %d, count: %d\n", n, count);
+    return 0;
+}