diff --git a/2207/C语言精通120题.md b/2207/C语言精通120题.md
index edec402..0ea5834 100644
--- a/2207/C语言精通120题.md
+++ b/2207/C语言精通120题.md
@@ -22,7 +22,20 @@ int main(void){
 
 
 2．输入一个华氏温度，要求输出摄氏温度。公式为c=5/9*(f-32)
+```c
+#include <stdio.h>
 
+int main(void){
+	
+	float f, c;
+	scanf("%f", &f);
+	//c = 5.0/9*(f-32);
+	c = (double)5/9*(f-32);
+	printf("%f\n", c);
+
+	return 0;
+}
+```
 
 
 3．写一个程序，输入实数X,输出Y,计算<img src="https://yp.smallkun.cn/markdown/image-20250116004443767.png!compress" alt="image-20250116004443767" style="zoom:33%;" />