22 lines
443 B
C
22 lines
443 B
C
/*-------------------------------------------------------
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编程计算：s=1!+2!+3!+…n! （n由键盘输入，使用for循环）
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-------------------------------------------------------*/
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#include <stdio.h>
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main()
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{
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int i,j,n;
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long p,sum;
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sum=0;
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printf("请输入一个正整数n:");
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scanf("%d",&n);
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/**********Program**********/
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p = 1;
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for( i = 1;i <= n; i++ ){
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p *= i;
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sum += p;
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}
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/********** End **********/
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printf("1!+2!+...+%d!= %d\n",n,sum);
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}
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