14.c

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

/*
x               y
--------------------------
0               0.000000
15              0.258819
30              0.500000
45              0.707107
60              0.866025
75              0.965926
90              1.000000
105             0.965926
120             0.866025
135             0.707107
150             0.500000
165             0.258819
180             0.000000
*/

#define PI 3.14159265
int main()
{
    int i;
    float j, s;
    for (j=1.1; j >= 0; j-=0.1)
    {
        for (i=0; i<= 180; i+= 15)
        {
            s = sin(i*PI/180);
            if (fabsf(s-j)<=0.1)
            {
                printf("*");
            }
            else {
                printf(" ");
            }
        }
        printf("\n");
    }
}