C - Pointer Behind Struct

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

typedef struct{
    char *name;
    char *city;
    int age;
}data;

int addName(data *d){
    d->name = "lady gaga";

    return 0;
}

int addCity(data *d){
    d->city = "new york";

    return 0;
}

int addAge(data *d){
    d->age = 24;

    return 0;
}

int main(int c){
    system("color 5f");

    data* list;
    list = (data*) malloc(1*sizeof(data));

    addName(list);
    addCity(list);
    addAge(list);

    printf("%s, %d of %s",list->name, list->age, list->city);

    return 0;
}

C - Pointer Behind Struct