diff --git a/.gitignore b/.gitignore
index 6a11570..e6a356c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,7 @@
-.*
+*
 !.gitignore
-
-*.o
-*.out
-
-*.obj
-*.exe
\ No newline at end of file
+!^.*.c
+!^.*.cpp
+!^.*.h
+!^.*.md
+!Makefile
\ No newline at end of file
diff --git a/README.md b/README.md
index 2397a57..f682fcd 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
-注意 由于使用c++的regex库，所以需要编译时需要注意大于等于c++11语法
-注意 这是一个多文件编译的项目，需要你结合main.c和expr.cpp使用
-注意 gen-expr里面需要命令行里编译c语言，所以Windows需要自行配置以保证可以使用system命令编译，以及popen的路径
\ No newline at end of file
+- 由于使用c++的regex库，所以需要编译时需要至少c++11标准才能运行
+
+- 这是一个多文件编译的项目，需要你结合main.c和expr.cpp使用
+
+- gen-expr里面需要命令行里编译C语言，所以Windows需要自行配置，需要保证可以使用system命令编译，以及保证popen能够打开C源文件和编译后可执行文件(需要修改`TMP_C_SRC_FILE_PATH` `TMP_C_EXE_FILE_PATH` `TMP_COMPILE_CMD`)
+
+-  定义`ANSI_FMT_DISABLE`宏可以用于禁用ANSI转义码(由于有些终端并不支持)
diff --git a/debug.h b/debug.h
index 9a8900e..0aeed2f 100644
--- a/debug.h
+++ b/debug.h
@@ -40,7 +40,12 @@
 #define ANSI_BG_WHITE   "\33[1;47m"
 #define ANSI_NONE       "\33[0m"
 
+// Maybe Some Terminal Doesn't Support Color
+#ifndef ANSI_FMT_DISABLE
 #define ANSI_FMT(str, fmt) fmt str ANSI_NONE
+#else
+#define ANSI_FMT(str, fmt) str
+#endif
 
 #define _Log(...) \
   do { \
diff --git a/expr.cpp b/expr.cpp
index 07e595f..877b783 100644
--- a/expr.cpp
+++ b/expr.cpp
@@ -15,8 +15,8 @@
 // Modified by: Zhiyi Zhang in 2024.08
 
 #include "common.h"
-/* We use the POSIX regex functions to process regular expressions.
- * Type 'man regex' for more information about POSIX regex functions.
+/* We use regex to parse the expression.
+ * You can use regular expressions as well.
  */
 #include <regex>
 
@@ -64,8 +64,8 @@ typedef struct token {
     char str[32];
 } Token;
 
-static Token tokens[32] __attribute__((used)) = {};
-static int nr_token __attribute__((used))  = 0;
+static Token tokens[32] = { -1 };
+static int nr_token = -1;
 
 static bool make_token(char *e) {
     int position = 0;
@@ -77,7 +77,6 @@ static bool make_token(char *e) {
     while (e[position] != '\0') {
         /* Try all rules one by one. */
         for (i = 0; i < NR_REGEX; i ++) {
-            // if (regexec(&re[i], e + position, 1, &pmatch, 0) == 0 && pmatch.rm_so == 0) {
             if (std::regex_search(e + position, pmatch, re[i], std::regex_constants::match_continuous)) {
                 char *substr_start = e + position;
                 int substr_len = pmatch.length();
diff --git a/gen-expr/gen-expr.c b/gen-expr/gen-expr.c
index 5917576..4f37559 100644
--- a/gen-expr/gen-expr.c
+++ b/gen-expr/gen-expr.c
@@ -38,38 +38,38 @@ static char *code_format =
 "}";
 
 static void gen_rand_expr() {
-  buf[0] = '\0';
+    buf[0] = '\0';
 }
 
 int main(int argc, char *argv[]) {
-  int seed = time(0);
-  srand(seed);
-  int loop = 1;
-  if (argc > 1) {
-    sscanf(argv[1], "%d", &loop);
-  }
-  int i;
-  for (i = 0; i < loop; i ++) {
-    gen_rand_expr();
+    int seed = time(0);
+    srand(seed);
+    int loop = 1;
+    if (argc > 1) {
+        sscanf(argv[1], "%d", &loop);
+    }
+    int i;
+    for (i = 0; i < loop; i ++) {
+        gen_rand_expr();
 
-    sprintf(code_buf, code_format, buf);
+        sprintf(code_buf, code_format, buf);
 
-    FILE *fp = fopen(TMP_C_SRC_FILE_PATH, "w");
-    assert(fp != NULL);
-    fputs(code_buf, fp);
-    fclose(fp);
+        FILE *fp = fopen(TMP_C_SRC_FILE_PATH, "w");
+        assert(fp != NULL);
+        fputs(code_buf, fp);
+        fclose(fp);
 
-    int ret = system(TMP_COMPILE_CMD);
-    if (ret != 0) continue;
+        int ret = system(TMP_COMPILE_CMD);
+        if (ret != 0) continue;
 
-    fp = popen("." TMP_C_EXE_FILE_PATH, "r");
-    assert(fp != NULL);
+        fp = popen("." TMP_C_EXE_FILE_PATH, "r");
+        assert(fp != NULL);
 
-    int result;
-    ret = fscanf(fp, "%d", &result);
-    pclose(fp);
+        int result;
+        ret = fscanf(fp, "%d", &result);
+        pclose(fp);
 
-    printf("%u %s\n", result, buf);
-  }
-  return 0;
+        printf("%u %s\n", result, buf);
+    }
+    return 0;
 }
\ No newline at end of file
diff --git a/main.c b/main.c
index 5414848..0e12550 100644
--- a/main.c
+++ b/main.c
@@ -16,6 +16,10 @@
 
 #include "common.h"
 
+#ifndef PRId32 // dev-cpp 5.11 does not support PRId32
+#define PRId32 "d"
+#endif
+
 void init_regex(void);
 uint32_t expr(char *e, bool *success);
 
@@ -29,7 +33,7 @@ static int cmd_p(char *args) {
     bool success = true;
     uint32_t res = expr(args, &success);
     if (success) {
-        printf("$res = % " PRIdLEAST32 "\n", res);
+        printf("$res = % " PRId32 "\n", res);
     }
     return success;
 }
@@ -56,23 +60,23 @@ static void print_help() {
 }
 
 static int cmd_help(char *args) {
-  /* extract the first argument */
-  char *arg = strtok(NULL, " ");
-  int i;
+    /* extract the first argument */
+    char *arg = strtok(NULL, " ");
+    int i;
 
-  if (arg == NULL) {
+    if (arg == NULL) {
         /* no argument given */
         print_help();
-  }
-  else {
-    for (i = 0; i < NR_CMD; i ++) {
-        if (strcmp(arg, cmd_table[i].name) == 0) {
-            printf("%s - %s\n", cmd_table[i].name, cmd_table[i].description);
-            return 0;
-        }
     }
-    printf("Unknown command '%s'\n", arg);
-  }
+    else {
+        for (i = 0; i < NR_CMD; i ++) {
+            if (strcmp(arg, cmd_table[i].name) == 0) {
+                printf("%s - %s\n", cmd_table[i].name, cmd_table[i].description);
+                return 0;
+            }
+        }
+        printf("Unknown command '%s'\n", arg);
+    }
   return 0;
 }