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以下程序的功能是计算一元二次方程的根。代码如下,请将...
以下程序的功能是计算一元二次方程的根。代码如下,请将第10行标号处缺少的语句填写完整。#include <stdio.h> #include <stdlib.h> #include <math.h> #define EPS 1e-6 int main() { float a, b, c, disc, p, q; printf("Please enter the coefficients a,b,c:"); scanf("%f,%f,%f", &a, &b, &c); _________________________________ /* a=0时,输出"不是二次方程" */ { printf("It is not a quadratic equation!\n"); exit(0); /* C标准库函数,用于终止整个程序的执行,强制返回操作系统 */ } disc = b * b - 4 * a * c; /* 计算判别式 */ p = - b / (2 * a); q = sqrt(fabs(disc)) / (2 * a); if (fabs(disc) <= eps) * 判别式等于0时,输出两相等实根 { printf("x1="x2" %.2f\n", p); } else if (disc> EPS) /* 判别式大于0时,输出两不等实根 */ { printf("x1 = %.2f, x2 = %.2f\n", p+q, p-q); } else /* 判别式小于0时,输出两共轭复根 */ { printf("x1 = %.2f+%.2fi, ", p, q); printf("x2 = %.2f-%.2fi\n", p, q); } } return 0; }
A、if (fabs(a) <=> B、if (a <=> C、if (a=0)
D、if (a<= eps || a>=-EPS)
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