c - error: expected ‘)’ before ‘*’ token

Question

#include<stdio.h>
struct s_{
        int b;
}s;

int func1(s** ss){
        *ss->a = 10;
}
int func(s* t){
        func1(&t);
}
int main(){
        s a;
        func(&a);
        printf("
 a : %d 
",a.b);
        return 0;
}

Trying the sample program and getting an error with the o/p.

o/p:

[root@rss]# gcc d.c
d.c:6: error: expected ‘)’ before ‘*’ token
d.c:9: error: expected ‘)’ before ‘*’ token
d.c: In function ‘main’:
d.c:13: error: expected ‘;’ before ‘a’
d.c:14: error: ‘a’ undeclared (first use in this function)
d.c:14: error: (Each undeclared identifier is reported only once
d.c:14: error: for each function it appears in.)

Answer 1

1. You omitted the typedef that you need to declare your struct alias s.
2. The struct's member is b rather than a.
3. You failed to return anything from your functions. These should be void functions.
4. You need parens around ss in func1.
5. The parameterless main in C is int main(void).

 

#include <stdio.h>

typedef struct s_{
        int b;
}s;

void func1(s** ss){
        (*ss)->b = 10;
}

void func(s* t){
        func1(&t);
}

int main(void)
{
        s a;
        func(&a);
        printf("
 a.b : %d 
", a.b);
        return 0;
}