这个题目太简单了,我以自己的思路稍微优化一下你的代码吧
用户输入错误处理:在输入系数时,应当判断用户输入的数值是否合法,例如b和c不能同时为0等。此外,当输入非数字时,scanf函数会产生错误,可以使用feof函数判断是否到达文件结尾,如果没有到达文件尾部,则输出错误提示并要求重新输入。
#include <stdio.h>
#include <math.h>
double calculateDiscriminant(double a, double b, double c) {
return b * b - 4 * a * c;
}
int main() {
double a, b, c, delta, x1, x2;
printf("Please enter coefficients a, b, c: ");
if (scanf("%lf%lf%lf", &a, &b, &c) != 3 || a == 0) {
printf("Invalid input, please try again.\n");
return -1;
}
delta = calculateDiscriminant(a, b, c);
if (delta >= 0) {
x1 = (-b + sqrt(delta)) / (2 * a);
x2 = (-b - sqrt(delta)) / (2 * a);
printf("This equation has two roots: x1 = %.2lf, x2 = %.2lf\n", x1, x2);
} else {
printf("This equation has no real roots.\n");
}
return 0;
}