蓝桥杯基础练习VIP-矩形面积交-题解（C语言代码）

解题思路:本人一步步分类讨论，写了好久才写出来，是目前我写的最长的代码啦，好有成就感！！记录一下~

注意事项:

参考代码:

#include<stdio.h>

#include<math.h>

void swap(double*,double*);

int main()

{

double a1,b1,a2,b2;

double x1,y1,x2,y2;

scanf("%lf%lf%lf%lf%lf%lf%lf%lf",&a1,&b1,&a2,&b2,&x1,&y1,&x2,&y2);

if(a1>a2) swap(&a1,&a2);

if(b1<b2) swap(&b1,&b2);

if(x1>x2) swap(&x1,&x2);

if(y1<y2) swap(&y1,&y2);

//printf("%d %d %d %d\n%d %d %d %d\n",a1,b1,a2,b2,x1,y1,x2,y2);

if(x1<a1){

if(x2<=a1) printf("0.00\n");

else if(x2>a1&&x2<=a2){

if(y1>=b1){

if(y2>=b1) printf("0.00\n");

else if(y2>=b2&&y2<b1) printf("%.2f\n",fabs((a1-x2)*(b1-y2))*1.0);

else printf("%.2f\n",fabs((a1-x2)*(b1-y2))*1.0);

}else if(y1>b2&&y1<b1){

if(y2>=b2) printf("%.2f\n",fabs((a1-x2)*(y1-y2)*1.0));

else printf("%.2f\n",fabs((a1-x2)*(y1-b2))*1.0);

}else printf("0.00\n");

}else{

if(y1>=b1){

if(y2>=b1) printf("0.00\n");

else if(y2>=b2&&y2<b1) printf("%.2f\n",fabs((a1-a2)*(b1-y2))*1.0);

else printf("%.2f\n",fabs((a1-a2)*(b1-b2))*1.0);

}else if(y1>b2&&y1<b1){

if(y2>=b2) printf("%.2f\n",fabs((a1-a2)*(y1-y2)*1.0));

else printf("%.2f\n",fabs((a1-a2)*(y1-b2))*1.0);

}else printf("0.00\n");

}

}else if(x1>=a1&&x1<=a2){

if(x2<=a2){

if(y1>=b1){

if(y2>=b1) printf("0.00\n");

else if(y2>=b2&&y2<b1) printf("%.2f\n",fabs((x1-x2)*(b1-y2))*1.0);

else printf("%.2f\n",fabs((x1-x2)*(b1-b2))*1.0);

}else if(y1>b2&&y1<b1){

if(y2>=b2) printf("%.2f\n",fabs((x1-x2)*(y1-y2)*1.0));

else printf("%.2f\n",fabs((x1-x2)*(x1-b2))*1.0);

}else printf("0.00\n");

}else {

if(y1>=b1){

if(y2>=b1) printf("0.00\n");

else if(y2>=b2&&y2<b1) printf("%.2f\n",fabs((x1-a2)*(b1-y2))*1.0);

else printf("%.2f\n",fabs((x1-a2)*(b1-b2))*1.0);

}else if(y1>b2&&y1<b1){

if(y2>=b2) printf("%.2f\n",fabs((x1-a2)*(y1-y2)*1.0));

else printf("%.2f\n",fabs((x1-a2)*(y1-b2))*1.0);

}else printf("0.00\n");

}

}

else printf("0.00\n");

return 0;

}

void swap(double *p1,double *p2)

{

double t;

t=*p1;

*p1=*p2;

*p2=t;

}