#include <stdio.h> int main() { float fenzi = 1,fenmu = 1,temp; int i,n; float sum=0,fenshu; scanf("%d",&n); for(i=1;i<=n;++i) { temp = fenzi; fenzi = fenzi + fenmu; fenmu = temp; fenshu = fenzi/fenmu; sum = sum + fenshu; } printf("%.2f",sum); return 0; } |
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