printf("请输入k,b:")
scanf("%f%f",&k,&b)
printf("请输入x:")
scanf("%f",&x)
y=k*x十b
printf("y=%f\n",y)
#include<stdio.h>#include<stdlib.h>
int main()
{
float k,b,x1,y1,x2,y2
printf("请按照x1,y1,x2,y2的顺序依次输入\n")
scanf("%f,%f,%f,%f",&x1,&y1,&x2,&y2)
b=(y2-y1)/(x2-x1)
k=(y1-b)/x1
printf("y=%fx+%f\n",k,b)
return 0
}