diff --git a/include/solution/345.h b/include/solution/345.h
new file mode 100644
index 0000000..56f1f6e
--- /dev/null
+++ b/include/solution/345.h
@@ -0,0 +1,11 @@
+#ifndef INC_345_H
+#define INC_345_H
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+    char *reverseVowels(char *s);
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/src/345.c b/src/345.c
new file mode 100644
index 0000000..36d403e
--- /dev/null
+++ b/src/345.c
@@ -0,0 +1,32 @@
+#include <solution/345.h>
+#include <string.h>
+
+#define equal(x)                                                                                                       \
+    ((x) == 'a' || (x) == 'A' || (x) == 'e' || (x) == 'E' || (x) == 'i' || (x) == 'I' || (x) == 'o' || (x) == 'O' ||   \
+     (x) == 'u' || (x) == 'U')
+
+#define swap(x, y, cb)                                                                                                 \
+    do                                                                                                                 \
+    {                                                                                                                  \
+        char t = x;                                                                                                    \
+        x = y;                                                                                                         \
+        y = t;                                                                                                         \
+        cb;                                                                                                            \
+    } while (0)
+
+char *reverseVowels(char *s)
+{
+    for (int i = 0, j = strlen(s) - 1, f = 1; i < j;)
+    {
+        if (f && equal(s[i]))
+            f = 0;
+        else if (f)
+            i++;
+        else if (!f && equal(s[j]))
+            swap(s[i], s[j], (f = 1, i++, j--));
+        else
+            j--;
+    }
+
+    return s;
+}
\ No newline at end of file
diff --git a/tests/test_345.cpp b/tests/test_345.cpp
new file mode 100644
index 0000000..f9d0bd4
--- /dev/null
+++ b/tests/test_345.cpp
@@ -0,0 +1,29 @@
+#include <gtest/gtest.h>
+#include <solution/345.h>
+
+class ReverseVowelsTest : public ::testing::Test
+{
+  protected:
+    // 测试包装器
+    void AssertReverseVowels(const std::string &input, const std::string &expected)
+    {
+        char buffer[1024];
+        strncpy(buffer, input.c_str(), sizeof(buffer));
+        buffer[sizeof(buffer) - 1] = '\0'; // 保证结尾
+
+        char *result = reverseVowels(buffer);
+        EXPECT_STREQ(result, expected.c_str());
+    }
+};
+
+// 示例 1
+TEST_F(ReverseVowelsTest, Example1)
+{
+    AssertReverseVowels("IceCreAm", "AceCreIm");
+}
+
+// 示例 2
+TEST_F(ReverseVowelsTest, Example2)
+{
+    AssertReverseVowels("leetcode", "leotcede");
+}