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#2
风过无痕19892020-10-17 00:30
回复 楼主 PGLWGES
错误已经在注释中说明了，并帮你修改了
 程序代码：#include<stdio.h> #include<math.h> int main() { double a, b, c, disc, x1, x2, realpart, imagpart; scanf_s("%lf,%lf,%lf", &a, &b, &c); //第2个%lf前多了一个% printf("The equation"); if (fabs(a) <= 1e-6) printf("is not a quadratic\n"); else { disc = b * b - 4.0 * a * c; // 由于定义的是 double 类型，改为4.0为好(下同) if (fabs(disc) <= 1e-6) printf("has two equal roots:%8.4f\n", -b / (2.0 * a)); else if (disc > 1e-6) { x1 = (-b + sqrt(disc)) / (2.0 * a); x2= (-b - sqrt(disc)) / (2.0 * a); printf("has distinct real roots:%8.4f and %8.4f\n", x1, x2); } else { realpart = -b / (2.0 * a); imagpart = sqrt(-disc) / (2.0 * a); printf("has complex roots:\n"); printf("%8.4f+%8.4fi\n", realpart, imagpart); printf("%8.4f-%8.4fi\n", realpart, imagpart); } } return 0; } [此贴子已经被作者于2020-10-17 02:11编辑过] |
#include<stdio.h>
#include<math.h>
int main()
{
double a, b, c, disc, x1, x2, realpart, imagpart;
scanf_s("%lf,%%lf,%lf", &a, &b, &c);
printf("The equation");
if (fabs(a) <= 1e-6)
printf("is not a quadratic\n");
else
{
disc = b * b - 4 * a * c;
if (fabs(disc) <= 1e-6)
printf("has two equal roots:%8.4f\n", -b / (2 * a));
else
if (disc > 1e-6)
{
x1 = (-b + sqrt(disc)) / (2 * a);
x2= (-b - sqrt(disc)) / (2 * a);
printf("has distinct real roots:%8.4f and %8.4f\n", x1, x2);
}
else
{
realpart = -b / (2 * a);
imagpart = sqrt(-disc) / (2 * a);
printf("has complex roots:\n");
printf("%8.4f+%8.4fi\n", realpart, imagpart);
printf("%8.4f-%8.4fi\n", realpart, imagpart);
}
}
return 0;
}