exp_out.c

C_C++_C#程序员实用大全（精华版）源代码 代码详实 一步一步的深入 适合各阶段的人揣摩

#include <stdio.h>

void main(void)
 {
   float pi = 3.14159;
   float radius = 2.0031;

   printf("The circle's area is %e\n", 2 * pi * radius);
   printf("The circle's area is %E\n", 2 * pi * radius);
 }