25 lines
331 B
C
25 lines
331 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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int main()
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{
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int n;
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int m=1;
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int x;
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double f=0.0; //f不是整数，是小数，用double表示
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printf("请输入数字：");
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scanf("%d", &n);
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for (x=1 ; x<=n; x++)
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{
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f = f+(1.0/x)*m;
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m = -1;
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}
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printf("f(%d)=%f\n", n, f); //f不是整数，是小数，用%f表示浮点数
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return 0;
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}
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