7     int i, index;  in interpolation()  local
25         index = i - 1;  in interpolation()
26         if ((float)x[index + 1] - (float)x[index] < 0.001)  in interpolation()
27             k = (float)y[index];  in interpolation()
29             k = ((float)x0 - (float)x[index]) / ((float)x[index + 1] - (float)x[index])  in interpolation()
30                 * ((float)y[index + 1] - (float)y[index])  in interpolation()
31                 + (float)y[index];  in interpolation()
39     int i, index;  in interpolation()  local
57         index = i - 1;  in interpolation()
58         if ((float)x[index + 1] - (float)x[index] < 0.001)  in interpolation()
59             k = (float)y[index];  in interpolation()
61             k = ((float)x0 - (float)x[index]) / ((float)x[index + 1] - (float)x[index])  in interpolation()
62                 * ((float)y[index + 1] - (float)y[index])  in interpolation()
63                 + (float)y[index];  in interpolation()
71     int i, index;  in interpolation()  local
76         index = 0;  in interpolation()
81         index = xNum - 2;  in interpolation()
90         index = i - 1;  in interpolation()
91         if (abs(x[index + 1] - x0) > abs(x0 - x[index])) {  in interpolation()
92             k = y[index - 1];  in interpolation()
95             k = y[index];  in interpolation()
99     return(index);  in interpolation()