2 files changed, 16 insertions, 1 deletions
diff --git a/os/stdlib/sdtlib.h b/os/stdlib/sdtlib.h
index a0b3402..85073d2 100644
--- a/os/stdlib/sdtlib.h
+++ b/os/stdlib/sdtlib.h
@@ -1 +1,2 @@
-char* int_to_str(int i);
-\ No newline at end of file
+char* int_to_str(int i);
+int strcmp(const char *str1, const char *str2);
+\ No newline at end of file
diff --git a/os/stdlib/stdlib.c b/os/stdlib/stdlib.c
index 465e978..bdb2242 100644
--- a/os/stdlib/stdlib.c
+++ b/os/stdlib/stdlib.c
@@ -18,4 +18,18 @@ char* int_to_str(int i)
     *--p = '-';
   }
   return p;
+}
+
+
+int strcmp(const char *str1, const char *str2)
+{
+	while(*str1){
+		if (*str1 != *str2) {
+	    break;
+    }
+		str1++;
+		str2++;
+	}
+
+	return *(const unsigned char*)str1 - *(const unsigned char*)str2;
 }
 \ No newline at end of file