sine taylor series for projanmo forum query

sinx.c

#include <stdio.h>
#include <math.h>

long fact(long p) {
    long i, mult = 1;

    for(i=1; i<=p; i++)
        mult *= i;

    return mult;
}

float sinex(float x, int n) {
    int m, i, j = 1;
    float sum = 0;

    for(i=0; i<n; i++) {
        m = 2 * i + 1;
        sum += j * pow(x, m) / fact(m);
        j = -j;
    }

    return sum;
}

int main() {
    int i, n;
    float x;

    while(1) {
        printf("Number of terms (enter 0 to quit): ");
        scanf("%d", &n);
        if(n == 0)
            break;

        printf("Enter a value for x: ");
        scanf("%f", &x);

        printf("\nValue of sin(%f) is %f\n", x, sin(x));
        printf("The series gave me %f\n\n", sinex(x, n));
    }

    return 0;
}