《算法竞赛入门经典》第二章 2.3
程序2-7
略去
程序2-8
1 #define LOCAL 2 #include<stdio.h> 3 #define INF 100000000 4 int main() 5 { 6 #ifdef LOCAL 7 freopen("data.in","r",stdin); 8 freopen("data.out","w",stdout); 9 #endif // LOCAL 10 int x, n = 0, min = INF, max = -INF, s = 0; 11 while(scanf("%d", &x) == 1) 12 { 13 s +=x; 14 if(x < min) min = x; 15 if(x > max) max = x; 16 /* 17 printf("x = %d, min = %d, max = %d\n ",x, min, max); 18 */ 19 n++; 20 } 21 printf("%d %d %0.3lf",min, max, (double)s/n); 22 return 0; 23 }
习题 2-9
1 #include<stdio.h> 2 #define INF 100000000 3 int main() 4 { 5 FILE *fin, *fout; 6 fin = fopen("data.in","rb"); 7 fout = fopen("data.out","wb"); 8 int x, n = 0, min = INF, max = -INF, s = 0; 9 while(fscanf(fin,"%d", &x) == 1) 10 { 11 s +=x; 12 if(x < min) min = x; 13 if(x > max) max = x; 14 n++; 15 } 16 fprintf(fout,"%d %d %0.3lf",min, max, (double)s/n); 17 fclose(fin); 18 fclose(fout); 19 return 0; 20 }
习题2-8,2-9文件操作，也是最近做论文才熟悉一些的。。。
