C語言規律循環累加求和

#include <stdio.h> void main(){ int i; float a,b,c,d,t; a = 1.0; b = 2.0; i = 1; t = 0; for (i = 1; i <= 20; i++) { if (i < 2){ c = b / a; t = c+t; a = a + 1; b = b + 1; //第一項不符合規律

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