void struct_Input (desires_maul *d_maul, int index, string s_input){

	switch(index){
		case 0 : d_maul -> WeaponDMGHigh = s_input ; break;
		case 1 : ...
	}
}

//Call example : struct_input(d_maul, 0, "over 9000"); <This will do d_maul.WeaponDMGHigh = over 9000;