#include#includevoid main(){float a,b,c,d;//a,b,c为系数printf("请输入方程的三个系数：\n");scanf("%f %f %f",&a,&b,&c);printf("该方程的根是：\n");d=b*b-4*a*c;if(d>1e-6)printf("x1=%f,x2=%f\n",(sqrt(d)-b)/(2*a),(-1*b-sqrt(d))/(2*a));//两根不相等else if(fabs(d)<1e-6)printf("x1=x2=%f\n",-1*b/(2*a));//两根相等elseprintf(
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