程序:
1 #include<stdio.h> 2 3 int main() { 4 int i,n; 5 double fz = 1,fm = 0,sum = 2; 6 scanf("%d",&n); 7 double s = 0; 8 for(i = 1; i <= n; i++) { 9 fm = fz; 10 fz = sum; 11 sum = fz + fm; 12 s += fz/fm; 13 } 14 printf("%0.2lf",s); 15 }