#include <stdio.h>
#include <stdlib.h>
 
void foo(float x, int n, float *v)
{
    int i, j;
    *v = 2.0f;
    printf("2 ");
    for (i=0; i<=n; ++i)
    {
        float element = 1.0f;
        for(j=1; j<=i*2+1; ++j)
            element *= x/j;
        printf("%c %.7f ", '+' + i%2*2, element);
        *v += (i%2 ? -element : element);
    }
    printf("\n");
}
 
int main()
{
    float x1, x2, v1,v2;
    x1 = 1, x2 = 2;
    int n = 5;
    printf("\n");
    foo(x1,n,&v1);
    foo(x2,n,&v2);
    printf(" v1 = %f \n\n", v1);
    printf(" v2 = %f \n\n", v2);
    return(0);
}

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