C Programming - Structures, Unions, Enums - Discussion

Answer is 37, no error occur in this.

Yeah correct output is.

Sanjay 37.
Compiled on devc++.

Can we pass the address of structure object? Like done in modify(&e).

Yes, op absolutely sanjay 37, in GCC compiler doesn't shows the error, in turbo c it shows the error.

Output coming as Sanjay 37.

No errors.

Here because giving typedef it is taking firstly the structure declaration. After then we are declaring above modify function like: void modify(q*p). So we are getting correct o/p.

#include<stdio.h>
#include<string.h>
typedef struct emp q;
void modify(q *p);
struct emp
{
char name[20];
int age;
};

int main()
{
struct emp e = {"Sanjay", 35};
modify(&e);
printf("%s %d", e.name, e.age);
return 0;
}
void modify(struct emp *p)
{
p ->age=p->age+2;
}

I am not getting any error, and got correct output by using typedef
can anyone explain?

I agree with rahul there is no error while compiling or executing the program.

What is meant by prototype?

You need to put the statement "void modify(struct emp*);" after declaring struct because the prototype tells the compiler that there is a struct which is mentioned before hence leading to an error. So prog will look like this:


#include<stdio.h>
#include<string.h>

struct emp
{
char name[20];
int age;
};
void modify(struct emp*);
int main()
{
struct emp e = {"Sanjay", 35};
modify(&e);
printf("%s %d", e.name, e.age);
return 0;
}
void modify(struct emp *p)
{
p ->age=p->age+2;
}