程序
#include<stdio.h>
int mian()
{
int m;
double x, y,s;
printf("Enter x:");
scanf("%lf",&x);
int m;
double x, y,s;
printf("Enter x:");
scanf("%lf",&x);
printf("Enter m:");
scanf("%d",&m);
if(x<=3){
y=10;
}
else
if(x<=10){
y=10+(x-3)*2;
}
else{
y=24+(x-10)*3;
}
if(m%5==0){
scanf("%d",&m);
if(x<=3){
y=10;
}
else
if(x<=10){
y=10+(x-3)*2;
}
else{
y=24+(x-10)*3;
}
if(m%5==0){
s=y+2*m/5;
}
else{
s=y+(m-m%5)*2/5;
}
printf("s=%.0f\n",s);
return 0;
}
}
else{
s=y+(m-m%5)*2/5;
}
printf("s=%.0f\n",s);
return 0;
}
#include<stdio.h>
#include<math.h>
int main()
{
double x1,x2 ,x3,y1,y2 ,y3,m,n,a,b,c,s;
printf("Enter x1,y1:");
printf("Enter x1,y1:");
scanf("%lf%lf" ,&x1,&y1);
printf("Enter x2 ,y2:");
scanf("%lf%lf" ,&x2 ,&y2);
printf("Enter x3,y3:");
scanf ("%lf%lf" , &x3 ,&y3);
if((x2-x1)*(y3-y2)- (y2-y1)*(x3-x2)==0)
printf("Impossible\n");
printf("Enter x3,y3:");
scanf ("%lf%lf" , &x3 ,&y3);
if((x2-x1)*(y3-y2)- (y2-y1)*(x3-x2)==0)
printf("Impossible\n");
else{
a=sqrt(pow(x2-x1 ,2)+pow(y2-y1,2));
b=sqrt(pow(x3-x1 ,2)+pow(y3-y1,2));
c=sqrt(pow(x3-x2 ,2)+pow(y3-y2,2));
c=sqrt(pow(x3-x2 ,2)+pow(y3-y2,2));
m=a+b+c;
s=m/2;
n=sqrt(s*(s-a)*(s-b)*(s-c));
n=sqrt(s*(s-a)*(s-b)*(s-c));
printf("Is Triangle\n");
printf("m=% .2f ,n=% .2f'' ,m,n);
return 0;
}