newbie print struct C programming question

I am new in C programming, and trying to create simple code below for printing a struct member using other function.

I do not understand this, as in the function funct_to_print_value, I already declare the struct variable "car", and开发者_高级运维 I believe what I need is just to print is using (dot) notation to access it. Appereantly not, as I got the error above. Does anyone can share their knowledge, how I can print the value of buyer, and what mistake I had done above?

Thank you ..

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


typedef struct slot_car {
    int buyer;
} slot_car;



int main() {



    slot_car car;
    memset(&car, 0, sizeof(car));
    car.buyer = 1;

    printf("value of car is .. %d\n", car.buyer);

    funct_to_print_value();
    printf("end of function..\n");
    return 0;
}

int funct_to_print_value()
{
    printf("you are in printlist function..\n");
    slot_car car;
    printf("value of car inside is %d\n", car.buyer);

    return 1;
}

---

Since you declared car inside each function separately, they are separate (local) variables. You probably want to pass it from main to funct_to_print_value as a parameter instead. The warning is strange, but it is possible that the compiler detected the uninitiated value and gave this message because it is first used in printf.

---

This looks fine to me. It would be helpful to have more information. All I did was extract your example into a temp.c file and compile it using gcc -c temp.c. There were no errors.

On which OS is this?

Which build environment/compiler is this?

How are you building this? (commands used in the build environment)

I'm using gcc 4.4.3 on Ubuntu Linux 10.04.

Edit 1:

What happens if you cast car.buyer to an int?

printf("value of car is .. %d\n", (int ) car.buyer);

Edit 2:

How about this to print your 1?

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


typedef struct slot_car {
    int buyer;
} slot_car;



int main() {



    slot_car car;
    memset(&car, 0, sizeof(car));
    car.buyer = 1;

    printf("value of car is .. %d\n", car.buyer);

    {
       int temp_ret;
       temp_ret = funct_to_print_value();
       printf("end of function..%d\n",temp_ret);
    }
    return 0;
}

int funct_to_print_value()
{
    printf("you are in printlist function..\n");
    slot_car car;
    printf("value of car inside is %d\n", car.buyer);

    return 1;
}

value of car is .. 1
you are in printlist function..
value of car inside is 134514096
end of function..1
cnorton@steamboy:~/scratch$