From a341b7c346fec3dacccf1f06ed52c690466bfd30 Mon Sep 17 00:00:00 2001
From: Erik Strand <erik.strand@cba.mit.edu>
Date: Thu, 12 Nov 2020 16:18:07 -0500
Subject: [PATCH] Break the example code
---
gdb/README.md | 3 +++
gdb/main.cpp | 3 ++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/gdb/README.md b/gdb/README.md
index a9b6a61..bc275bb 100644
--- a/gdb/README.md
+++ b/gdb/README.md
@@ -21,6 +21,9 @@ build it from [source](https://www.gnu.org/software/gdb/current/).
## Debugging on Your Computer
+Let's try running the example program in this directory. It should tell us which numbers are prime.
+But there seems to be a problem.
+
## Debugging on Your Microcontroller
I'll refrain from
diff --git a/gdb/main.cpp b/gdb/main.cpp
index fb3a887..33fd700 100644
--- a/gdb/main.cpp
+++ b/gdb/main.cpp
@@ -1,8 +1,9 @@
#include <iostream>
+#include <cmath>
// This is a simple function that checks if numbers are prime. Or does it? There may be a bug...
bool is_prime(int x) {
- for (int i = 2; i < x / 2; ++i) {
+ for (int i = 2; i < std::sqrt(x); ++i) {
if (x % i == 0) {
return false;
}
--
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