#include<stdio.h>

void metodoAnalitico(float xInicial, float xFinal, float xProx, float yInicial, float yFinal, float yProx, float i, float coeficienteAngular)
{
    puts("X         Y");
    xProx = xInicial;
    yProx = yInicial;
    for (i = xInicial; i <= xFinal; i = i + 0.5)
    {
        printf("%f  %f\n", xProx, yProx);
        xProx = xProx + 0.5;
        yProx = coeficienteAngular*(xProx) + yInicial;
    }
}

void metodoDDA(float difX, float difY, float xInicial, float xFinal, float xProx, float yInicial, float yFinal, float yProx, float i, float coeficienteAngular)
{
    if(difX > difY)
    {
        yProx = yInicial;
        xProx = xInicial;
        for (i = xInicial; i <= xFinal; i++)
        {
            printf("%f  %f\n", xProx, yProx);
            xProx = xProx++;
            yProx = coeficienteAngular + yProx;
        }
    }
    else if(difX < difY)
    {
        yProx = yInicial;
        xProx = xInicial;
        for (i = yInicial; i <= yFinal; i++)
        {
            printf("%f  %f\n", xProx, yProx);
            yProx = yProx++;
            xProx = (1/coeficienteAngular) + xProx;
        }
    }
}

int main()
{
    float xInicial, yInicial, xFinal, yFinal, coeficienteAngular, i, yProx, xProx, difX, difY;

    printf("X inicial: ");
    scanf("%f", &xInicial);
    printf("Y inicial: ");
    scanf("%f", &yInicial);

    printf("X final: ");
    scanf("%f", &xFinal);
    printf("Y final: ");
    scanf("%f", &yFinal);

    coeficienteAngular = (yFinal - yInicial)/(xFinal - xInicial);

    difX = xFinal - xInicial;
    difY = yFinal - yInicial;

    puts("\n\nMETODO ANALITICO");
    printf("Coef. Angular: %f\n", coeficienteAngular);
    metodoAnalitico(xInicial, xFinal, xProx, yInicial, yFinal, yProx, i, coeficienteAngular);

    puts("\n\nMETODO DDA");
    printf("Coef. Angular: %f\n", coeficienteAngular);
    metodoDDA(difX, difY, xInicial, xFinal, xProx, yInicial, yFinal, yProx, i, coeficienteAngular);
}