C and pointer (pointers on C) -- Chapter 10: Structure and Union (ii) exercises

C and pointer (pointers on C) -- Chapter 10: Structure and Union (ii) exercises

// 1. the exercises in this chapter are purely for the sake of existence... Typedef struct phone {char * quhao; char * jiaohuantai; char * zhanhaoma;}; typedef struct call {char * date; char * time; phone * shiyong; phone * self; phone * hujiao ;}; 2. typedef struct cash {float retail_price; float sale; float sales_tax; float licensing_fee ;}; typedef struct daikuan {float hour; float sales_tax; float licensing_ment; float interval; float loan_duration; float interst_rate; float interval ;}; typedef struct zulin {float interval; float down_payment; float interval; int lease_term ;}; typedef struct sale {char name [20]; char address [40]; char model [20]; union {cash trade; daikuan trade; zulin trade ;};};