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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. typedef struct student* Student; // taking Student as pointer to Struct
  4. int initMemory(Student );
  5. struct student {
  6.     char* mark; /* or array[2] like array[0] = 'A' , array[1] = 'B' */
  7.     int age;
  8.     int weight;
  9. };
  10.  
  11. typedef enum{
  12.     MEMORY_GOOD,
  13.     MEMORY_BAD} Status; 
  14.  
  15. int main(int argc, char* argv[]) {
  16.  
  17.     Status status;
  18.  
  19.     Student john;  /* Pointer to struct */
  20.  
  21.     /* Function  call to allocate memory*/
  22.     status = initMemory(john);
  23. 	printf("got status code %d",status);
  24. }
  25.  
  26.  
  27. int initMemory(Student _st){
  28.      _st =  (Student)malloc(sizeof(Student));
  29.  
  30.     printf("Storage size for student : %d \n", sizeof(_st));
  31.     if(_st == NULL)
  32.     {
  33.         return MEMORY_BAD;
  34.     }   else {
  35.  
  36. 	    char* _tmp = malloc(2*sizeof(char)); /* error: request for member 'mark' in something not a structure or union */
  37. 		_st->mark = _tmp;
  38.     	return MEMORY_GOOD; 
  39. 	}
  40. }
  41.  
Success #stdin #stdout 0s 2300KB
comments (?)
stdin
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Standard input is empty
stdout
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Storage size for student : 4 
got status code 0
https://ideone.com/Ow2D2m
language:
C (gcc 8.3)
created:
9 years ago
visibility:
secret

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