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#include <stdio.h>
#include <math.h>
int main()
{
int a, b, c;
printf("input a,b,c\n");
scanf("%d%d%d", &a, &b, &c);
double delta;
double x1;
double x2;
delta = (b*b - 4 * a*c);
if (delta > 0)
{
x1 = (-b - sqrt(delta) / (2 * a));
x2 = (-b + sqrt(delta) / (2 * a));
printf("x1=%.2f, x2=%.2f\n", x1, x2);
}
else if (delta == 0)
{
x1 = (-b) / (2 * a);
x2 = x1;
printf("x1=%.2f, x2=%.2f\n", x1, x2);
}
else
{
printf("无解”!\n");
}
return 0;
}