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小弟刚学c,谁能告诉我怎么样将2.3 3.4之类的小数变成3和4 这样的整数
小弟刚学c,谁能告诉我怎么样将2.3 3.4之类的小数变成3和4 这样的整数，但是想原来是整数的3.0 4.0 还是3 和4
强制类型转换（int）+1不能解决3.0 4.0问题
强制类型转换（int）+1不能解决3.0 4.0问题
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hproof 2003-05-07
如果我想把 PI = 3.1415926535897932384626433832795028841971…… 这样的长数精确到小数点后n位，不知道 floor/ceil 能不能做?
像这样？
floor(pi, n);
florr(-pi, n);
...
像这样？
floor(pi, n);
florr(-pi, n);
...
ghtsao 2003-05-07
Example
/* FLOOR.C: This example displays the largest integers
* less than or equal to the floating-point values 2.8
* and -2.8. It then shows the smallest integers greater
* than or equal to 2.8 and -2.8.
*/
#include <math.h>
#include <stdio.h>
void main( void )
{
double y;
y = floor( 2.8 );
printf( "The floor of 2.8 is %f\n", y );
y = floor( -2.8 );
printf( "The floor of -2.8 is %f\n", y );
y = ceil( 2.8 );
printf( "The ceil of 2.8 is %f\n", y );
y = ceil( -2.8 );
printf( "The ceil of -2.8 is %f\n", y );
}
Output
The floor of 2.8 is 2.000000
The floor of -2.8 is -3.000000
The ceil of 2.8 is 3.000000
The ceil of -2.8 is -2.000000
放分哦
/* FLOOR.C: This example displays the largest integers
* less than or equal to the floating-point values 2.8
* and -2.8. It then shows the smallest integers greater
* than or equal to 2.8 and -2.8.
*/
#include <math.h>
#include <stdio.h>
void main( void )
{
double y;
y = floor( 2.8 );
printf( "The floor of 2.8 is %f\n", y );
y = floor( -2.8 );
printf( "The floor of -2.8 is %f\n", y );
y = ceil( 2.8 );
printf( "The ceil of 2.8 is %f\n", y );
y = ceil( -2.8 );
printf( "The ceil of -2.8 is %f\n", y );
}
Output
The floor of 2.8 is 2.000000
The floor of -2.8 is -3.000000
The ceil of 2.8 is 3.000000
The ceil of -2.8 is -2.000000
放分哦
gwsr 2003-05-07
引用C语言的数学函数：floor(x) 向下取整 ，ceil(x) 向上取整
