> compile NEMU

221220000 张三
Linux zzy 5.15.146.1-microsoft-standard-WSL2 #1 SMP Thu Jan 11 04:09:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
 08:40:08 up 22:54,  1 user,  load average: 0.28, 0.27, 0.24

abstract-machine/klib/src/printf.c

@@ -13,13 +13,13 @@ int num_to_ascii(int num, int power, int size, char *buf) {
     }
 
     for (i = 1; num; i ++) {
-        _buf[i] = num % power < 10 ? '0' + num % power : 'a' + num % power;
+        _buf[i] = (num % power) < 10 ? ('0' + num % power) : ('a' + num % power);
         num /= power;
     }
     if (i > size) {
         return 0; // error buffer overflow
     }
-    ret = i;
+    ret = i - 1;
 
     for (i --; i > 0; i --, buf ++ ) {
         *buf = _buf[i];
@@ -77,4 +77,4 @@ int rvsnprintf(char* out, size_t n, const char* fmt, va_list* ap) {
     }
     *out = '\0';
     return ret;
-}
+}