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 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;
}

Answer 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.