Why this code has error

Question

#include <stdio.h>
struct students
{
char name;
char address;
int roll;
int number;
}pavel,shoun,anik;
int main() {
struct students
pavel={'pavei','krishnager',44,96};
//pavel.name = 'pavel mukhergi';
//pavel.adress ='krishnager';
//pavel.roll = 44;
//pavel.number = 9674180546;
printf ("The name of pavel is %s\n The adress of pavel is %s\n The roll of pavel is %d\n The number of pavel is %d",pavel.name,pavel.address,pavel.roll,pavel.number);
return 0;
}

Answer 1

1. <name> and <address> field must be defined as `char` array. As it is in the code, they can only accept a single character.

2. Use C-String literal when assigning value for <name> and <address>. C-String are wrapped in double quotes e.g. "SoloLearn". Use of single quotes are for `char` literals e.g. a single character like 'G'

3. Need to use `unsigned long` type for the <number>. `int` doesn't support large integer value such as 9674180546 (causes integer overflow).

#include <stdio.h>

struct students
{
char name[ 25 ];
char address[ 25 ];
int roll;
unsigned long number;
} pavel, shoun, anik;

int main()
{
struct students pavel = { "pavel mukhergi", "krishnager", 44, 9674180546UL };
printf ( "The name of pavel is %s\nThe adress of pavel is %s\nThe roll of pavel is %d\nThe number of pavel is %lu\n", pavel.name, pavel.address, pavel.roll, pavel.number );
return 0;
}