[PROG1] Ficha 6 | Exercício 1

#include <stdio.h>
float factorial(int n)
{
    if (n == 0) return 1 ;
    else return (n * factorial(n-1)) ;
}
int signal (int n)
{
    int i , result = -1 ;
    for (i = 0 ; i < n ; i++) result *= -1 ;
    return result ;
}
float potencia(float x , int n)
{
    int i ;
    float result = x ;
    for (i = 0 ; i < n - 1 ; i++) result *= x ;
    return result ;
}
float mod (float n)
{
    if (n < 0) return (-n) ;
    else return (n) ;
}
float sen (float x , float t)
{
    float termo = x , total = 0 ;
    int i = 2 ;
    while (mod(termo) > t)
    {
        total += termo ;
        termo = signal (i) * (potencia (x , 2 * i - 1) / factorial (2 * i - 1)) ;
        i++ ;
    }
    return total ;
}
int main ()
{
    float x , t ;
    printf ("Qual é o valor de x? ") ;
    scanf ("%f" , &x) ;
    printf ("Qual o valor da tolerância? ") ;
    scanf ("%f" , &t) ;
    printf ("O seno de %.2f é %f\n" , x , sen(x , t)) ;
    return 0 ;
}