There is a fractional sequence: 2/1, 3/2, 5/3, 8/5, 13/8, 21/13... find the sum of the first 20 items of this series

# Include <stdio. h> void main () {int I, T;/* I indicates that the sum of T is replaced with */Double A = 2, B = 1;/*, B Represents the first number of molecules and denominator */for (I = 0; I <= 20; I = I + 1) {I = A/B; t =; A = a + B; B = T;} printf ("the sum of the first 20 items is; % d \ n", I );

}/* The numerator behind the score is equal to the numerator plus the denominator of the previous score, and the denominator of the subsequent score is equal to the numerator with the previous score */

There is a fractional sequence: 2/1, 3/2, 5/3, 8/5, 13/8, 21/13... find the sum of the first 20 items of this series