C语言基础：printf格式化输出浮点数
#include <stdio.h>
int main ()
{
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);
return 1;
}
gcc编译运行输出：
The circle's area is 1.258584e+01 The circle's area is 1.258584E+01
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