diff --git a/z5 b/z5
new file mode 100644
index 0000000..351fe3c
--- /dev/null
+++ b/z5
@@ -0,0 +1,8 @@
+// 7交换两个单精度浮点型数据 
+void  SwapFloat(float *x, float *y)
+{
+float temp;
+temp = *x;
+*x = *y;
+*y = temp;
+}
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