diff --git a/第一讲 变量、输入输出、表达式与顺序语句/616.cpp b/第一讲 变量、输入输出、表达式与顺序语句/616.cpp
new file mode 100644
index 0000000..6369b7e
--- /dev/null
+++ b/第一讲 变量、输入输出、表达式与顺序语句/616.cpp	
@@ -0,0 +1,11 @@
+#include <cstdio>
+#include <cmath>
+
+int main()
+{
+    double x1, y1, x2, y2;
+    scanf("%lf%lf", &x1, &y1);
+    scanf("%lf%lf", &x2, &y2);
+    printf("%.4lf\n",sqrt(pow((x1-x2),2)+pow((y1-y2),2)));
+    return 0;
+}
\ No newline at end of file