fix(exercise05): 不同的编译器有不同的递归深度限制

Signed-off-by: YdrMaster <[email protected]>
LearningInfiniTensor · Jul 10, 2024 · 87003d1 · 87003d1
1 parent 3253c06
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diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 # Learning C++
 
+> **NOTICE** 推荐阅读 [C++ 参考手册](https://zh.cppreference.com/w/cpp) 学习 C/C++ 语法和 STL 库。
+
 ## 使用指南
 
 1. 安装构建工具 [xmake](https://xmake.io/)

diff --git a/exercises/05_constexpr/main.cpp b/exercises/05_constexpr/main.cpp
@@ -1,6 +1,6 @@
 #include "../exercise.h"
 
-constexpr int fibonacci(int i) {
+constexpr unsigned long long fibonacci(int i) {
     switch (i) {
         case 0:
             return 0;
@@ -13,10 +13,11 @@ constexpr int fibonacci(int i) {
 
 int main(int argc, char **argv) {
     constexpr auto FIB20 = fibonacci(20);
+    ASSERT(FIB20 == 6765, "fibonacci(20) should be 6765");
     std::cout << "fibonacci(20) = " << FIB20 << std::endl;
 
     // TODO: 观察错误信息，修改一处，使代码编译运行
-    constexpr auto ANS_N = 30;
+    constexpr auto ANS_N = 100;
     constexpr auto ANS = fibonacci(ANS_N);
     std::cout << "fibonacci(" << ANS_N << ") = " << ANS << std::endl;