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#include<stdio.h>
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int factorial(int n)
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{
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if(n==0)
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return 1;
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return n*factorial(n-1);
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}
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int main()
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{
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int n,x;
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printf("请输入你想要求的阶乘的数：");
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scanf("%d",&n);
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x=factorial(n);
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printf("%d的阶乘是%d\n",n,x);
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return 0;
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}
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