class constructor creating instance of arbitrary struct C++ - c++

Question

I want to make a class that creates an instance of an arbitrary struct and then has methods to write and load these structs from a file system. I currently do this with a macro that takes the name of the instance of the struct and saves and loads it. I wanted to instead create a class object that would wrap all of these together, but I don't know how to pass and use an arbitrary struct to the constructor.
I am limited to C++11.
The code would work something like this
struct typeA{
int age;
int weight;
};
struct typeB{
char name[10];
int height;
};
class StructControl{
public:
void target;
StructControl(void ITEM){
ITEM target;
}
void S(void * addr,uint32_t size){
//code for saving
}
void L(void * addr, unint32_t size){
//code for loading
}
void Save(){
S(&target,sizeof(target));
}
void Load(){
L(&target,sizeof(target));
}
};
void main(){
StructControl myA(typeA);
myA.target.age=45;
myA.Save();
StructControl myB(typeB);
myB.height=110;
myB.Save();
}

Answer 1

Thank you to the #TheUndeadFish and #PaulMcKenzie for pointing me towards templates.
#include <iostream>
#include <cmath>
#include <string>
#include <cstring>
#include <fstream>
#include <string.h>
#include <cstdint>
using namespace std;
struct typeA{
int age=25;
int weight=13;
};
struct typeB{
char name[10];
int height=55;
};
template <class TYPE>
class StructControl{
public:
TYPE target;
char selfname[10];
StructControl(const char * name){
strcpy(selfname,name);
printf("name:%s\n",selfname);
}
void Save(){
printf("Saving object of size %lu to addr:%p\n",sizeof(target),&target);
//also save the struct to file
}
void Load(){
printf("Loading object of size %lu to addr:%p\n",sizeof(target),&target);
//also load the struct from file
}
};
};
int main(){
StructControl<typeA> myA("myA");
printf("myA Age:%d\n",myA.target.age);
myA.target.age=45;
printf("myA Age:%d\n",myA.target.age);
myA.Save();
myA.Load();
StructControl<typeB> myB("myB");
printf("myB Height:%d\n",myB.target.height);
myB.target.height=110;
printf("myB Height:%d\n",myB.target.height);
myB.Save();
return 0;
}
OUTPUT:
name:myA
myA Age:25
myA Age:45
Saving object of size 8 to addr:0x7fffbfb716b0
Loading object of size 8 to addr:0x7fffbfb716b0
name:myB
myB Height:55
myB Height:110
Saving object of size 16 to addr:0x7fffbfb716d0