Merge pull request '第一题实现.c' (#2) from pmfsq5yrv/sudoku_valider:main into main

print_grid.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+void printGrid(int grid[9][9]) {
+    int i, j;
+    for (i = 0; i < 9; i++) {
+        for (j = 0; j < 9; j++) {
+            printf("%2d ", grid[i][j]);
+            if ((j + 1) % 3 == 0 && j < 8) {
+                printf("| ");
+            }
+        }
+        printf("\n");
+        if ((i + 1) % 3 == 0 && i < 8) {
+            printf("-----------------------\n");
+        }
+    }
+}