fork download
copy 
  1. #include<stdio.h>
  2. #include<math.h>
  3. #define STUDENTS 5
  4. #define EXAMS 3
  5.  
  6. typedef struct{
  7.     int id;
  8.     int math;
  9.     int english;
  10.     int physics;
  11.     double ave;
  12.     double std;
  13. }Grades;
  14.  
  15. int main(void)
  16. {
  17.     Grades data[] = { { 1, 65, 80, 95 },
  18.                       { 2, 70, 68, 75 },
  19.                       { 3, 60, 100, 83 },
  20.                       { 4, 100, 55, 74 },
  21.                       { 5, 90, 85, 100 } };
  22.  
  23.     for(int i=0; i<STUDENTS; i++){
  24.         data[i].ave = (data[i].math + data[i].english + data[i].physics) / EXAMS;
  25.         data[i].std = sqrt( ( (data[i].math - data[i].ave)*(data[i].math - data[i].ave) +
  26.                               (data[i].english - data[i].ave)*(data[i].english - data[i].ave) +
  27.                               (data[i].physics - data[i].ave)*(data[i].physics - data[i].ave)
  28.                             ) / EXAMS
  29.                           );
  30.         printf( "id %d : %.1f, %.1f\n", data[i].id, data[i].ave, data[i].std );
  31.     }
  32.  
  33.     return 0;
  34. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
id 1 : 80.0, 12.2
id 2 : 71.0, 2.9
id 3 : 81.0, 16.4
id 4 : 76.0, 18.4
id 5 : 91.0, 6.3
https://ideone.com/7cIX4y
language:
C (gcc 8.3)
created:
20 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!