输入一个数,分别打印数的符号,整数部分,小数部分,不能使用abs. fabs
输入123.456测试,小数部分多了0.000001
// 方法三:用int取整和if判断
#include <stdio.h>
int main()
{
double a;
scanf("%lf",&a);
if (a<0)
{
printf("sign:-\n");
printf("integral part:%d\n",int(a)*-1);
printf("decimal fraction part:%f",(a-int(a))*-1);
}
else
{
printf("sign:+\n");
printf("integral part:%d\n",int(a)*-1);
printf("decimal fraction part:%f",(a-int(a))*-1);
}
}