Initial commit: C language learning code

翁凯C语言/3/浮点数的输入和输出.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+
+int main()
+{
+    double ff = 1234.56789;
+    printf("科学计数法的输出：ff = %e\n", ff);  //%e是科学计数法的输出
+    printf("科学计数法的输出：ff = %E\n", ff);  //%E是科学计数法的输出（底数是大写的）
+    printf("普通格式的输出：ff = %f\n", ff);   //%f是普通格式的输出
+
+    double fff = 1E-10;
+    printf("科学计数法的输出：ff = %e\n", fff); //%e是科学计数法的输出
+    printf("科学计数法的输出：ff = %E\n", fff); //%E是科学计数法的输出（底数是大写的）
+    printf("普通格式的输出：ff = %f\n", fff);   //%f是普通格式的输出
+    printf("普通格式的输出：ff = %.16f\n", fff);   //%.16f是普通格式的保留16位小数的输出
+
+    return 0;
+}