29 lines
485 B
C
29 lines
485 B
C
/*-------------------------------------------------------
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编程计算π的近似值（直到最后一项的绝对值小于10-5为止，使用while）:
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-------------------------------------------------------*/
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#include <stdio.h>
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#include <math.h>
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#define N 1e-5
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main()
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{
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int i,f;
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double t,s;
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f=1;
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s=0;
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i=1;
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t=1.0;
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/**********Program**********/
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while(fabs(t/i)>N){
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s+=t/i*f;//计算该项的值
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f*=-1;//翻转符号
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i+=2;
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}
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/********** End **********/
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s=s*4 ;
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printf("圆周率的近似值为：%f\n",s);
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}
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