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求斐波那契数列:从键盘输入一个正整数n,输出前n项斐波那契数列。
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代码:
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#include<stdio.h>
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int fib(int n)
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{
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if(n==1||n==2)
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{
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return 1;
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}
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else return fib(n-1)+fib(n-2);
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}
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int main()
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{
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int i,n,s;
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scanf("%d",&n);
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for(i=1;i<=n;i++)
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{
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printf("%d ",fib(i));
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}
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return 0;
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}
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运行时间:0.17s
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运行结果:
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输入:1 输出:1
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输入:2 输出:1 1
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输入:3 输出:1 1 2
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输入:4 输出:1 1 2 3
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输入:5 输出:1 1 2 3 5
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输入:6 输出:1 1 2 3 5 8
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输入:7 输出:1 1 2 3 5 8 13
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输入:8 输出:1 1 2 3 5 8 13 21
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输入:9 输出:1 1 2 3 5 8 13 21 34
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输入:10 输出:1 1 2 3 5 8 13 21 34 55
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