学生证管理系统（C语言课程设计）(5)

&StuInfo[i].CInfo.Cno,&StuInfo[i].CInfo.Cname);

}

fclose(fp); num=i;

for(i=0;i

count++;

mAge+=StuInfo[i].Age;

}

}

if(count>0)

{

mAge/=count; }

return mAge; }

5.7.2 统计女生信息子模块

void Female() {

int num; float mg;

num=FemaleNum(); mg=FemaleMG();

printf(\女生总人数为：%d\\n平均年龄为：%f\\n\}

5.7.2.1 返回女生人数子函数

int FemaleNum() {

int num; int count=0; int i; FILE*fp;

if((fp=fopen(\ {

printf(\文件打不开！\\n\

menu();

}

for(i=0;!feof(fp);i++) {

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fscanf(fp,\StuInfo[i].CInfo.Cno,&StuInfo[i].CInfo.Cname);

}

fclose(fp); num=i;

for(i=0;i

count++;

} }

return count; }

5.7.2.2返回女生平均年龄

float FemaleMG() {

int num; int count=0;

int found; float mAge=0; int i; FILE*fp;

if((fp=fopen(\ {

printf(\文件打不开！\\n\ menu(); }

for(i=0;!feof(fp);i++) {

fscanf(fp,\StuInfo[i].CInfo.Cno,&StuInfo[i].CInfo.Cname);

}

fclose(fp); num=i;

for(i=0;i

{

found=i; count++;

mAge+=StuInfo[i].Age;

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}

}

if(count>0) {

mAge/=count; }

return mAge; }

5.7.3 全体学生统计信息子模块

void StuMsg() {

int num; float mg;

num=StuNum(); mg=MG();

printf(\学生总人数为：%d\\n学生平均年龄为：%f\\n\ Male(); Female(); }

5.7.3.1 返回全体学生的人数子函数

int StuNum() {

int num;

num=MaleNum()+FemaleNum(); return num; }

5.7.3.2 返回全体学生的平均年龄子函数

float MG() {

float mAge;

mAge=(MaleNum()*MaleMG()+FemaleNum()*FemaleMG())/(MaleNum()+FemaleNum()); return mAge; }

5.8 删除模块

void Delete() { int num; int i;

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int found=-1;

char StuNO[20]; FILE*fpr,*fpw;

if((fpr=fopen(\ {

printf(\文件打不开！\\n\ menu();

}

for(i=0;!feof(fpr);i++) {

fscanf(fpr,\

&StuInfo[i].Sname,&StuInfo[i].Sex, &StuInfo[i].Sno,&StuInfo[i].Age, &StuInfo[i].CInfo.Cno, &StuInfo[i].CInfo.Cname);

}

num=i; fclose(fpr);

printf(\请输入学号选择你要删除的记录:\ scanf(\ for(i=0;i

{

if(strcmp(StuNO,StuInfo[i].Sno)==0) { found=i; printf(\你删除的学生信息为：\\n\\n\ printf(\姓名 性别 学号 年龄 班号 班名\\n\

printf(\Info[found].Age,StuInfo[found].CInfo.Cno,StuInfo[found].CInfo.Cname); if(found

{

for(found;found

{

strcpy(StuInfo[found].Sname,StuInfo[found+1].Sname);

strcpy(StuInfo[found].Sex,StuInfo[found+1].Sex); strcpy(StuInfo[found].Sno,StuInfo[found+1].Sno); StuInfo[found].Age=StuInfo[found+1].Age;

strcpy(StuInfo[found].CInfo.Cno,StuInfo[found+1].CInfo.Cno);

strcpy(StuInfo[found].CInfo.Cname,StuInfo[found+1].CInfo.Cname); } }

if((fpw=fopen(\ {

printf(\文件打不开！\\n\

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menu();

} for(i=0;i

{

fprintf(fpw,\o[i].Age,StuInfo[i].CInfo.Cno,StuInfo[i].CInfo.Cname);

}

fclose(fpw);

printf(\修改成功！\\n\

printf(\请按enter键返回主菜单!\\n\

getchar(); getchar(); menu(); } } if(found<0) {

printf(\没有找到该学号的记录:\\n\

printf(\请按enter键返回主菜单!\\n\

getchar(); getchar(); menu(); } }

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