C语言计算一元二次方程的根.求指出错误#include #include int main(void){float a,b,c,d,x1,x2;char ans;printf("Enter the coefficients of the quadratic equation>");scanf("%f\t%f\t%f",&a,&b,&c);if(a =0 && d >=0){d=pow(b,2)-4*a*c;x1=(-b+sqrt
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