Question

VC执行程序时exe停止运行

！！！！运行着程序时exe停止工作
//用弦截法求方程f(x)=x^3-5x^2+16x-80=0的根
#include<stdio.h>
#include<math.h>
float f(float x) //定义f(x)
{
float y;
y=((x-5.0)*x+16.0)*x-80.0;
return y;
}

float xpoint(float x1,float x2) //定义xpoint 求出弦与x轴的交点
{
float y;
y=(x1*f(x2)-x2*f(x1))/(f(x2)-f(x1));
return y;
}

float root(float x1,float x2) //定义root 求近似根
{
float x,y,y1;
y1=f(x1);
do
{
x=xpoint(x1,x2);
y=f(x);
if(y*y1>0)
{
y1=y;
x1=x;
}
else
x2=x;
}while(fabs(y)>=0.0001);
return x;
}

void main()
{
float x1,x2,f1,f2,x;
do
{
printf("input x1,x2:\n");
scanf("%f,%f",x1,x2);
f1=f(x1);
f2=f(x2);
}
while(f1*f2>=0);
x=root(x1,x2);
printf("A root of equation is %8.4f\n",x);
}

程序应该没错 是不是VC有问题

Answer 1

scanf("%f,%f",&x1,&x2);

追问

靠 编译时怎么不提示错误