C语言编程问题请教—求解方程的根、大小写字母转换答:include <stdio.h>#include <math.h>int main() {double a,b,c,disc,p,q,x1,x2;scanf_s("%lf%lf%lf",&a,&b,&c);// 用空格隔开三个数disc = b*b - 4*a*c;if(disc < 0) printf("The equation hasn't real roots.\n");else {p = -b/(2.0*a);q = sqrt(disc)/...