diff --git a/ChaCha20_DRBG.c b/ChaCha20_DRBG.c
index 448e26c..f77da4f 100755
--- a/ChaCha20_DRBG.c
+++ b/ChaCha20_DRBG.c
@@ -748,12 +748,12 @@ int main() {
 
   // 需要生成的比特串长度
   printf("Enter the length of the bit string to be generated(bit): ");
-  scanf("%d", &returned_bits_len);
+  scanf("%ld", &returned_bits_len);
   // returned_bits_len = 128;
 
   // 需要生成的比特串个数
   printf("Enter the number of the bit string to be generated: ");
-  scanf("%d", &returned_bits_num);
+  scanf("%ld", &returned_bits_num);
   // returned_bits_num = 1000;
 
   // char *filename; filename 未分配内存