c语言实习报告(4)

/*修改学生信息*/ void Student_Modify() {

while(1) {

char id[20]; int index;

printf(\请输入要修改的学生的学号:\ scanf(\ getchar();

index=Student_SearchByIndex(id); if (index==-1) {

printf(\学生不存在!\\n\ } else {

printf(\你要修改的学生信息为:\\n\ Student_DisplaySingle(index); printf(\请输入新值--\\n\ printf(\请输入学号:\

scanf(\ getchar();

printf(\请输入姓名:\

scanf(\ getchar();

printf(\请输入年龄:\

scanf(\ getchar();

printf(\请输入数学:\

scanf(\ getchar();

printf(\请输入英语:\

scanf(\ getchar();

printf(\请输入物理:\

scanf(\ getchar();

students[index].Total=Tol(students[index]); }

printf(\是否继续?(Y/N)\ if (getchar()=='N') {

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break; } } }

/*删除学生信息*/ void Student_Delete() { int i; while(1) {

char id[20]; int index;

printf(\请输入要删除的学生的学号:\ scanf(\ getchar();

index=Student_SearchByIndex(id); if (index==-1) {

printf(\学生不存在!\\n\ } else {

printf(\你要删除的学生信息为:\\n\ Student_DisplaySingle(index); printf(\是否真的要删除?(Y/N)\ if (getchar()=='Y') {

for (i=index;i

students[i]=students[i+1]; }

num--; }

getchar(); }

printf(\是否继续?(Y/N)\ if (getchar()=='N') {

break; } } }

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/*按姓名查询*/

void Student_Select() {

while(1) {

char name[20]; int index;

printf(\请输入要查询的学生的姓名:\ scanf(\ getchar();

index=Student_SearchByName(name); if (index==-1) {

printf(\学生不存在!\\n\ } else {

printf(\你要查询的学生信息为:\\n\ Student_DisplaySingle(index); }

printf(\是否继续?(Y/N)\ if (getchar()=='N') {

break; } } }

/*按学号排序*/

void Student_SortByID() {

int i,j;

struct Student tmp; for (i=0;i

for (j=1;j

if (strcmp(students[j-1].ID,students[j].ID)==1) {

tmp=students[j-1];

students[j-1]=students[j]; students[j]=tmp;

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} } } }

/*显示学生信息*/ void Student_Display() { int i;

printf(\学号\姓名\年龄\数学\英语\物理\总成绩\

printf(\ for (i=0;i

printf(%udents[i].Age,

students[i].Math,students[i].English,students[i].Physics,students[i].Total); } }

/*将学生信息从文件读出*/ void IO_ReadInfo() {

FILE *fp; int i;

if ((fp=fopen(\ {

printf(\不能打开文件!\\n\ return; }

if (fread(&num,sizeof(int),1,fp)!=1) {

num=-1; } else {

for(i=0;i

fread(&students[i],sizeof(struct Student),1,fp); } }

fclose(fp);

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}

/*将学生信息写入文件*/ void IO_WriteInfo() {

FILE *fp; int i;

if ((fp=fopen(\ {

printf(\不能打开文件!\\n\ return; }

if (fwrite(&num,sizeof(int),1,fp)!=1) {

printf(\写入文件错误!\\n\ }

for (i=0;i

if (fwrite(&students[i],sizeof(struct Student),1,fp)!=1) {

printf(\写入文件错误!\\n\ } }

fclose(fp); }

/*主程序*/ void main() {

char choice; IO_ReadInfo(); while(1) {

printf(\学生成绩管理系统------\\n\ printf(\：插入一个新的学生记录\\n\ printf(\：修改学生记录\\n\

printf(\：删除一个学生记录\\n\

printf(\：按姓名查询单个同学信息\\n\ printf(\：按学号排序\\n\ printf(\：浏览全班成绩\\n\ printf(\请选择(A-F):\ scanf(\

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