Thread: Help in passing a strcture in function

Hello All,
I want to pass a structure through a function. I am new in C programming. Help me.

I am getting an error as bad function type.

it would be better if you posted your program but here is an overview of how to pass a structure as an argument :

#include<stdio.h>

Code:

struct node
{
       int item; 
};

void func1(struct node a);


int main()
{
    struct node b;
    b.item = 1;
    func1(b);
    return 0;
}

void func1(struct node b)
{
     printf("%d", b.item);
}

just make sure that a copy of the structure is passed in this case, if you want to change values in a structure inside a function you need to pass a pointer to that structure.

please post your code so that we can find where u are going rough. any way here is sample code to how pass struct to the function

Code:

#include<stdio.h>
/* skeleton of struct student or the abstract datatype*/
struct student
{
    int studno;
    char name[20];
};
/* fucniotn to print details of each student where it takes struct student as a parameter*/
void printdetails(struct student tempst)
{
    printf("Student Id %d\n", tempst.studno);
    printf("name %s",tempst.name);
}
/*fucniotn to clear the input buffer*/
void clr_buf()
{
    char ch;
    while((ch=getchar())!='\n' && ch!=EOF);
}

 
int main()
{
    struct student s1;   //    instance of type struct student
    
    printf("Enter Stduent id\n");
    scanf("%d",&s1.studno);   
    
    clr_buf();    //  clear the input buffer
    printf("Enter name\n");
    fgets(s1.name,20,stdin);
    
    printdetails(s1);  // call printdetails by sending the instance 
    
    getchar();
}

s.s.harish

hahahahahhahah I wonder myself

a better reply than mine though

Hello ,
I will type the code

#include<stdio.h>

Code:

 typedef struct
 {
   int id;
   char info[100];
   int salary;
 } linklist;

  void addComission(linklist*,int);

 main()
 {
    int ids,salaries;
    char tempname[100];

    linklist l1;

    printf("Enter the id of the person ");
    scanf("%d",&ids);
    printf("Enter the name of the person ");    
    scanf("%s",tempname);    
    printf("Enter the salary of the person");
    scanf("%d",&salaries);
   
    
    l1.id=ids;
    strcpy(l1.info, tempname);    
    l1.salary=salaries;           

    if(l1.salary > 3000)
    {
       addComission(&l1,200);
       printf("Id is %d\n" , l1.id);
       printf("Name is %s\n",l1.info);
       printf("Salary is %d\n",l1.salary);     
    }
    else{
       printf("Id is %d\n" , l1.id);
       printf("Name is %s\n",l1.info);
       printf("Salary is %d\n",l1.salary);     
    }
    getchar();
 }
 
 void addComission(linklist *l1, int bonus)
 {
   int salarys;
   salarys = l1->salary;
   salarys = salarys + bonus;
   
 }.

Hey with your code I got the following error.

c:\program files\miracle c\structure.c: line 92: illegal dereference
'printdetails(s1)'
aborting compile

btw what is the problem you have in your code.
It worked fine when i compile and i dont get any compilation errors

In your code you missed including string.h file and in addCommision() you omitted l1->salary = salarys

rest and all is ok...

regards
Ravi

program works fine just change this

add string.h file and your addCommision() should look like this if I am correct :

Code:

void addComission(linklist *l1, int bonus)
 {
   int salarys;
   salarys = l1->salary;
   l1->salary = salarys + bonus;
   
 }

value assignment in C is from right to left not from left to right

use fgets() to read string rather than scanf()

find out the reason fgets in FAQ


s.s.harish