#include <stdio.h>
#include <math.h>
 
int main() 
{
    double a = 2.5;
    double b = 0.4;
    double y;
 
    double t_start = -1.0;
    double t_end = 1.0;
    int points = 50;
    for (int i = 0; i < points; i++) 
    {
        double t = t_start + i * (t_end - t_start) / (points - 1);
 
        if (t<-0.1)
        {
        	y = pow(a * t * t + b * sin(t) + 1, 0.5);
        }
 
        else if (t >= -0.1 && t <= 0.5)
        {
        	y = a * t + b;
        }
 
        else
        {
        	y = pow(a * t * t + b * cos(t) + 1, 0.5);
        }
 
        printf("y\n");
        printf("%f\n", y);
    }
 
    return 0;
}

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