diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..26b914f
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,28 @@
+{
+  "tasks": [
+    {
+      "type": "cppbuild",
+      "label": "C/C++: gcc.exe 生成活动文件",
+      "command": "C:\\Users\\GaoShiBo\\software\\mingw64\\bin\\gcc.exe",
+      "args": [
+        "-fdiagnostics-color=always",
+        "-g",
+        "${file}",
+        "-o",
+        "${fileDirname}\\${fileBasenameNoExtension}.exe"
+      ],
+      "options": {
+        "cwd": "${fileDirname}"
+      },
+      "problemMatcher": [
+        "$gcc"
+      ],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "detail": "调试器生成的任务。"
+    }
+  ],
+  "version": "2.0.0"
+}
\ No newline at end of file
diff --git a/fillMatrix.c b/fillMatrix.c
index d0e973b..4083d21 100644
--- a/fillMatrix.c
+++ b/fillMatrix.c
@@ -1,10 +1,31 @@
 #include "myMatrix.h"
 
-int fillMatrix(){
-  //todo
+int fillMatrix(int matrixArr[9][9], int row, int col){
+  if(row==9){
+    return 1;
+  }
+  if(col==9){
+    return fillMatrix(matrixArr,row+1,0);
+  }
+  if(matrixArr[row][col]!=0){
+    return fillMatrix(matrixArr, row, col+1);
+  }
+  for(int i=1;i<=9;i++){
+    matrixArr[row][col]=i;
+    if(checkMatrix(matrixArr,0)){
+      if(fillMatrix(matrixArr,row,col+1)){
+        return 1;
+      }
+      matrixArr[row][col]=0;
+    }else{
+      matrixArr[row][col]=0;
+    }
+  }
+  return 0;
 }
 
-int main(){
+int main()
+{
   int board0[9][9] = {{5, 3, 0, 0, 7, 0, 0, 0, 0},
                       {6, 0, 0, 1, 9, 5, 0, 0, 0},
                       {0, 9, 8, 0, 0, 0, 0, 6, 0},
@@ -32,12 +53,22 @@ int main(){
                       {0, 6, 0, 0, 0, 0, 2, 8, 0},
                       {0, 0, 0, 4, 1, 9, 0, 0, 5},
                       {0, 0, 0, 0, 8, 0, 0, 7, 9}};
-
   printf("The original Sudoku matrix: \n");
-  matrixOutput(board1);
-  if(checkMatrix(board1,1)){
-    fillMatrix();
-  }else{
+  matrixOutput(board0);
+  if (checkMatrix(board0, 1))
+  {
+    if (fillMatrix(board0, 0, 0))
+    {
+      printf("\nThe solution of Sudoku matrix:\n");
+      matrixOutput(board0);
+    }
+    else
+    {
+      printf("\nNo solution!");
+    }
+  }
+  else
+  {
     printf("\nNo solution!");
   }
   return 0;
diff --git a/fillMatrix.exe b/fillMatrix.exe
new file mode 100644
index 0000000..e39d7e0
Binary files /dev/null and b/fillMatrix.exe differ