C语言 C语言如何将一位小数点后的两位数格式化为2位？

C language how to format a double to 2 digits after the decimal point?

提问by Saeed ALSferi

Possible Duplicate:
Limit floating point precision?

可能的重复：
限制浮点精度？

In C language, I need to format a number to 2 digits after the decimal point from user input

在C语言中，我需要将用户输入的数字格式化为小数点后2位

For example:

例如：

 float x ; 
 printf("Enter number");

Let's suppose the user enters 4.54234635

假设用户输入 4.54234635

I need to print and process in the whole program: 4.54

我需要在整个程序中打印和处理： 4.54

Thanks advance

提前致谢

回答by Dmitry Zheshinsky

scanf("%.2f",&x);

And i think that will solve a problem

我认为这会解决一个问题

回答by Shash

The complete list

完整清单

Integer   display
%d      print as decimal integer
%6d     print as decimal integer, at least 6 characters wide
%f      print as floating point
%6f     print as floating point, at least 6 characters wide
%.2f    print as floating point, 2 characters after decimal point

With the required modification (scanf("%.2f",&x);in the last entry) will solve your problem

通过所需的修改（scanf("%.2f",&x);在最后一个条目中）将解决您的问题

回答by Jah

use

用

scanf("%.2f",&number);

or
printf("%.2f", number);

或者
printf("%.2f", number);