1015: C语言程序设计教程（第三版）课后习题6.5

 1 int main(int argc, char const *argv[])
 2 {
 3     
 4     int a, b, c, i;
 5     float s1 = 0, s2 = 0, s3 = 0;
 6 
 7     scanf("%d%d%d", &a, &b, &c);
 8 
 9     for(i = 1; i <= a; i++)
10     {
11         s1 += i;
12     }
13 
14     for(i = 1; i <= b; i++)
15     {
16         s2 += i * i;
17     }
18 
19     for(i = 1; i <= c; i++)
20     {
21         s3 += 1.0 / i;
22     }
23 
24 
25     printf("%.2f\n", s1+s2+s3);
26     return 0;
27 }