Question

C语言 编写程序 求下列分段函数的值

Answer 1

#include <stdio.h>
#include <stdlib.h>
void main()
{
float x,y;
printf("请输入X的值：\n");
scanf("%f",&x);
if(x>-1)
{
y=1/(1+x);
}
else if(x==-1)
{
y=0;
}
else
{
y=x*x;
}
printf("y=%f",y);
return 0;
}

Answer 2

double fun(double x)
{
if(x>-1) return 1/(1+x);
else if( x== -1 ) return 0;
else return x*x;
}

Answer 3

#include<stdio.h>

int main(void)
{
double x,y=0;
printf("input x ");
scanf("%lf",&x);

if(x>-1)
{
y = 1/(1+x);
}
else if(x==-1)
{
y=0;
}
else
{
y = x*x;
}

printf("y=%lf",y);

}