AI#include#includevoidin（）{intabcd;abcdfloatx1x2;x1xscanf（%d%d%d%d&a&b&c&d）;if（a==0）printf（x=%.2f（float）（d-c）b）;else{floatdr=b*b-4*a*c;c-=d;if（dr>0）{x1=（-b-sqrt（dr））（2*a）;x2=（-b+sqrt（dr））（2*a）;printf（x1=%.2fx2=%.2fnx1x2）;}if（dr==0）{x1=（-b+sqrt（dr））（2*a）;printf（x=%.2fnx1）;}if（dr0）{x1=（-b-sqrt（dr））（2*a）;x2=（-b+sqrt（dr））（2*a）;printf（（x1=%.2fy1=%.2f）x1a1*pow（x13）+b1*pow（x12）+c*x1+d1）;printf（（x2=%.2fy2=%.2f）nx2a1*pow（x23）+b1*pow（x22）+c*x2+d1）;}if（dr==0）{x1=（-b+sqrt（dr））（2*a）;printf（（x=%.2fy=%.2f）nx1a1*pow（x13）+b1*pow（x12）+c*x1+d1）;}if（dr