2003

 1 #include <stdio.h>
 2 
 3 int main()
 4 {
 5     double num;
 6     while(scanf("%lf",&num))
 7     {
 8         if(num < 0)
 9         {
10             num = 0 - num;
11         }
12         printf("%.2lf\n",num);
13     }
14     return 0;
15 }

 1 #include <math.h>
 2 #include <stdio.h>
 3 
 4 int main(void)
 5 {
 6     double r;
 7 
 8     while (scanf("%lf", &r) != EOF)
 9         printf("%.2lf\n", fabs(r));
10 
11     return 0;
12 }