/* 考虑这两个无限序列: 1.0 + 1.0/2.0 + 1.0/3.0 + 1.0/4.0 + ... 1.0 - 1.0/2.0 + 1.0/3.0 - 1.0/4.0 + ... 编写一个程序来计算这两个序列不断变化的总和,直到达到某个次数。让用户交互地输入这个次数。 */#include <stdio.h>int main (void){ int j, fcf, i; double sum1, sum2; printf ("请输入次数:"); while (1 == scanf ("%d",&i)) { for (sum1 = 0, j = 1, sum2 = 0, fcf = -1; j <= i; ++j) { fcf *= (-1); sum1 = sum1 + (1.0 / i); sum2 = sum2 + (1.0 / i) * fcf; } printf ("%lf %lf\n",sum1,sum2); printf ("请输入另一个次数:"); } system ("pause"); return 0;}
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