#define _CRT_SECURE_NO_WARNINGS // Exp3-2_SeqStack_Expandable #include <stdio.h> #include <stdlib.h> #include <string.h> #define STACK_INIT_LENGTH 4 #define STACK_INCREMENT 3 #define STU_ID_MAXLEN 16 #define STU_NAME_MAXLEN 20 // 学生结构体 typedef struct { char stuId[STU_ID_MAXLEN]; char name[STU_NAME_MAXLEN]; char gender; float score; } Stu; // 动态顺序栈结构体 typedef struct { Stu *base; // 存放学生的动态数组的起始地址，数组大小可以扩充，因此称其为“动态” int stackSize; // 当前顺序栈中数组单元的个数 int top; // 栈顶元素的下标 } SeqStack; Stu *ps; int stuNum; // Get alternative all students' data void loadAllStudent() { FILE *fp; int i = 0; if ((fp = fopen("allStu.dat", "rb")) == NULL) { printf("Cannot open the data file, failed to save the student information!"); return; } // 开始读文件，先读人数，根据人数开辟空间的大小 fread(&stuNum, sizeof(int), 1, fp); ps = (Stu *)malloc(sizeof(Stu)*stuNum); while (i < stuNum) { fread(&(ps[i]), sizeof(Stu), 1, fp); i++; } // fread(ps, sizeof(Stu), stuNum, fp); fclose(fp); } void menu() { printf("\n\t****Expandable Sequence Stack(Space can be expanded dynamically)****\n"); printf("\t* 1 Choose a student & Push *\n"); printf("\t* 2 Pop a student from the stack *\n"); printf("\t* 3 Read the top element of the stack and print *\n"); printf("\t* 4 Show all the students in the stack *\n"); printf("\t* 0 Save the data and Exit the program *\n"); printf("\t********************************************************************\n"); printf("\tPlease select a menu item:\n"); } /* Check whether the file stu3-2.dat exist in the current directory. If it exists, the data will be read from it to construct a sequence stack. */ void init(SeqStack &seqStack) { FILE *fp; Stu stmp; int