C++ init class member in definition

/*
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*/

#include <stdio.h>

class MyClass{
public:
    MyClass(){}
    int var {5};
};

typedef struct MyStruct{
    int var {7};
}MyStruct;

int main(){
    MyClass c;
    printf("%i \n", c.var);
    MyStruct s;
    printf("%i \n", s.var);
    return 0;
};