C 语言的 round 函数是数学函数之一,用于返回给定数字或指定表达式的 nearest value(四舍五入后的值)。数学 round 函数的语法是
double round(double round);
round 函数示例
数学 round 函数允许您找到给定数字最接近的整数值。在此程序中,我们将找到不同数字的最接近整数值并显示输出。
#include <stdio.h>
#include <math.h>
int main()
{
printf("\n The Round Value of 0.75 = %.2f ", round(0.75));
printf("\n The Round Value of 15.25 = %.2f ", round(15.25));
printf("\n The Round Value of 152.50 = %.2f ", round(152.50));
printf("\n The Round Value of -14.36 = %.2f ", round(-14.36));
printf("\n The Round Value of -26.82 = %.2f ", round(-26.32));
printf("\n The Round Value of -90.50 = %.2f \n", round(-90.50));
return 0;
}

math round 示例 2
在此 C 编程示例中,我们允许用户输入自己的值。接下来,该 程序使用 math round 函数来查找四舍五入(最接近)的值。
#include <stdio.h>
#include <math.h>
int main()
{
float number, roundValue;
printf(" Please Enter any Numeric Value to Round : ");
scanf("%f", &number);
roundValue = round(number);
printf("\n The Round Value of %.2f = %.4f \n", number, roundValue);
return 0;
}
Please Enter any Numeric Value to Round : 12.23
The Round Value of 12.23 = 12.0000