Returning a struct in a void func()-CodePudding

I'm trying to compile my code from the old MS-DOS days and this doesn't seem to work with GCC:

    typedef struct { int x,y,z; } vector;

    inline void vect_add(vector& c,vector a, vector b)
    {
        c.x=a.x b.x;
        c.y=a.y b.y;
        c.z=a.z b.z;
    }

Basically I'm trying to return a struct which is later used as vector.x etc instead of rewriting it as a pointer to struct and rewriting all as vector->x etc

see (vector& c,

CodePudding user response：

That is possibly valid C , but it's not valid C.

In C, you need to use a pointer, a global var, or actually return a struct.

typedef struct { int x, y, z; } vector;

inline void vect_add(vector* c, vector a, vector b)
{
    c->x = a.x   b.x;
    c->y = a.y   b.y;
    c->z = a.z   b.z;
}

vect_add(&c, a, b);