蓝桥杯：矩形面积交

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <math.h>#define max(x,y) ((x)>(y)?(x):(y))#define min(x,y) ((x)<(y)?(x):(y))int main(){    double a1,a2,b1,b2,a3,a4,b3,b4,s,m1,m2,n1,n2;    scanf("%lf %lf %lf %lf",&a1,&b1,&a2,&b2);    scanf("%lf %lf %lf %lf",&a3,&b3,&a4,&b4);    m1=max(min(a1,a2),min(a3,a4));    n1=min(max(b1,b2),max(b3,b4));    m2=min(max(a1,a2),max(a3,a4));    n2=max(min(b1,b2),min(b3,b4));    if(m2>m1&&n1>n2)    printf("%.2lf",(m2-m1)*(n1-n2));    else printf("0.00");    return 0;}