求∑k(k取[1,100])+∑k^2(k取[1,50])+∑1/k(k取[1,10])的和。
程序：
#include <stdio.h>
int main()
{
double k,sum,s1 = 0, s2 = 0, s3 = 0;
for (k = 1; k <= 100; k++)
{
s1 += k;
}
for (k = 1; k <= 50; k++)
{
s2 += k*k;
}
for (k = 1; k <= 10; k++)
{
s3 += 1/k;
}
sum = s1 + s2 + s3;
printf("sum=%10.4f\n",sum);
return 0;
}
结果：
sum=47977.9290
请按任意键继续. . .
