C language structure array and sample code _c language

An array of structures is a structure in which each element of an exponential group is a structural body. In practical applications, structure arrays are often used to denote a group with the same data structure, such as a class student, a workshop worker, etc.

To define the structure body array and define the structure variables in a similar way, see the following example:

struct stu{
  char *name;//name
  int num;//School number
  int age;//ages
  char Group;//group 
  float score;//score
}CL ASS[5];

It means that there are 5 students in one class.

An array of structs can also be initialized when defined, for example:

struct stu{
  char *name;//name
  int num;//School number
  int age;//ages
  char Group;//group 
  float score;//score 
   
    }class[5] = {
  "Li ping", 5,, ' C ', 145.0},
  {"Zhang ping", 4,, ' A ', 130.5},
  {"He fang", 1, ' a ', 1 48.5},
  {"Cheng Ling", 2, ' F ', 139.0},
  {"Wang Ming", 3, E, ' B ', 144.5}
};
   

When all the elements in an array are assigned, the length of the array is not given, for example:

struct stu{
  char *name;//name
  int num;//School number
  int age;//ages
  char Group;//group 
  float score;//score
}CL Ass[] = {
  "Li ping", 5,, ' C ', 145.0},
  {"Zhang ping", 4,, ' A ', 130.5},
  {"He fang", 1, ' a ', 148.5},
   {"Cheng Ling", 2, ' F ', 139.0},
  {"Wang Ming", 3,, ' B ', 144.5}
};

The use of structure arrays is also simple, for example, to get the results of Wang Ming:

Class[4].score;

To modify Li Ping's Study group:

Class[0].group = ' B ';

The example calculates the total score of the class, the average score, and the number of people below 140 points.

#include <stdio.h>
struct{
  char *name;//name
  int num;//School number
  int age;//ages
  char Group;//Group
  float score//Results
} Class[] = {
  "Li ping", 5,, ' C ', 145.0},
  {"Zhang ping", 4,, ' A ', 130.5},
  {"He fang", 1, ' A ', 148.5} ,
  {"Cheng Ling", 2, ' F ', 139.0},
  {"Wang Ming", 3,, ' B ', 144.5}
};
int main () {
  int i, num_140 = 0;
  float average, sum = 0;
  For (i=0 i<5; i++) {
    sum = Class[i].score;
    if (Class[i].score < 140) num_140++;
  }
  printf ("sum=%.2f\naverage=%.2f\nnum_140=%d\n", Sum, SUM/5, num_140);
  return 0;
}

Run Result:

sum=707.50
average=141.50
num_140=2

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