#include <stdio.h> typedef union { struct { unsigned int x , y; }; unsigned int e[2]; }v2; typedef union { struct { unsigned int x , y , z; }; struct { unsigned int r , g , b; }; v2 xy; unsigned int e[3]; }v3; typedef union { struct { unsigned int x , y , z , w; }; struct { unsigned int r , g , b , a; }; v3 xyz; v3 rgb; unsigned int e[4]; }v4; // v2add , v3add , v4add #define vXaddDefine(Elements) \ void v##Elements##add(unsigned int *Result,unsigned int *First,unsigned int *Second) \ { \ for(int i = 0; \ i < Elements; \ i++) \ Result[i] = First[i] + Second[i]; \ } vXaddDefine(2) vXaddDefine(3) vXaddDefine(4) // vAdd, pass in vector size void vAdd(unsigned int *Result,unsigned int *First,unsigned int *Second, int Elements) { for(int i = 0; i < Elements; i++) Result[i] = First[i] + Second[i]; } int main() { v4 aero = {}; aero.x = 5; aero.y = 3; aero.z = 9; aero.w = 100; v4add(aero.e,aero.e,aero.e); //Equivalent functions vAdd(aero.e,aero.e,aero.e,4); printf("%i\n",aero.x); printf("%i\n",aero.y); printf("%i\n",aero.z); printf("%i\n",aero.w); printf("\n"); v2 llll; llll.x = 1; llll.y = 2; printf("v2.x %i\n",llll.x); printf("v2.y %i\n",llll.y); printf("v2.e[0] %i\n",llll.e[0]); printf("v2.e[1] %i\n",llll.e[1]); return 0; }