eg.1-1/2+1/3-1/4+1/5-1/6+…+1/99-1/100
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>int main()
{int i = 0;double sum = 0.0;int flag = 1;for (i = 1; i <= 100; i++){sum += flag*1.0 / i;flag = -flag;}printf("%lf\n", sum);return 0;
}
eg.1-1/2+1/3-1/4+1/5-1/6+…+1/99-1/100
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>int main()
{int i = 0;double sum = 0.0;int flag = 1;for (i = 1; i <= 100; i++){sum += flag*1.0 / i;flag = -flag;}printf("%lf\n", sum);return 0;
}
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