學(xué)生成績(jī)管理代碼

1、#i nclude stdio.h#i ncludestri ng/*定義學(xué)生結(jié)構(gòu)體*/struct Stude ntchar ID20;char Name20;float Mark1;float Mark2;float Mark3;float Average;/*聲明學(xué)生數(shù)組及學(xué)生數(shù)量*/struct Student students1000;int num=0;/*求平均值*/ float Avg(struct Stude nt stu)return (stu.Mark1+stu.Mark2+stu.Mark3)/3;/*通過(guò)學(xué)號(hào)返回?cái)?shù)組下標(biāo)*/int Stude nt_SearchByl

2、 ndex(char id)int i;for (i=0;i nu m;i+)if (strcmp(stude ntsi.ID,id)=O)return i;return -1;/*通過(guò)姓名返回?cái)?shù)組下標(biāo)*/int Stude nt_SearchByName(char n ame)int i;for (i=0;i nu m;i+)if (strcmp(stude ntsi.Name, name)=0)return i;return -1;/*顯示單條學(xué)生記錄*/void Stude nt_DisplaySi ngle(i nt in dex) printf(%10s%10s%8s%8s%8s%1

3、0sn,學(xué)號(hào),姓名,成績(jī),成績(jī),成績(jī),平均成績(jī));printf(n);prin tf(%10s%10s%8.2f%8.2f%8.2f%10.2fn,stude ntsi ndex.ID,stude nts in dex.Name,stude ntsi ndex.Mark1,stude ntsi ndex.Mark2,stude ntsi ndex.Mark3,stu den tsi ndex.Average);/*插入學(xué)生信息*/void Stude nt_ln sert()while(1)printf(請(qǐng)輸入學(xué)號(hào):);sea nf(%s,&stude nts nu m.ID);getchar

4、();printf(請(qǐng)輸入姓名:);sea nf(%s,&stude nts num.Name); getchar();printf(請(qǐng)輸入成績(jī):);sea nf(%f,&stude nts num.Mark1); getchar();printf(請(qǐng)輸入成績(jī):);sea nf(%f,&stude nts num.Mark2); getchar();printf(請(qǐng)輸入成績(jī):);sca nf(%f,&stude nts num.Mark3);getchar();stude nts nu m.Average=Avg(stude nts nu m);nu m+;printf(是否繼續(xù)？(y/n);

5、if (getchar()= n)break;/*修改學(xué)生信息*/void Stude nt_Modify()/float mark1,mark2,mark3;while(1)char id20;int in dex;printf(請(qǐng)輸入要修改的學(xué)生的學(xué)號(hào):);sea nf(%s，&id);getchar();in dex=Stude nt_SearchByl ndex(id);if (in dex=-1)printf(學(xué)生不存在!n);elseprintf(你要修改的學(xué)生信息為:n);Stude nt_DisplayS in gle(i ndex);prin tf(-請(qǐng)輸入新值-n);pri

6、ntf(請(qǐng)輸入學(xué)號(hào):）；sea nf(%s,&stude ntsi ndex.ID); getchar();printf(請(qǐng)輸入姓名:);sca nf(%s,&stude ntsi ndex.Name); getchar();printf(請(qǐng)輸入成績(jī):);sca nf(%f,&stude ntsi ndex.Mark1); getchar();printf(請(qǐng)輸入成績(jī):);sca nf(%f,&stude ntsi ndex.Mark2); getchar();printf(請(qǐng)輸入成績(jī):);sca nf(%f,&stude ntsi ndex.Mark3);getchar();stude ntsi ndex.Average=Avg(stude ntsi ndex);printf(是否繼續(xù)？(y/n);if (getchar()= n)break;/*刪除學(xué)生信息*/void Stude nt_Delete()int i;while(1)char id20;int in dex;printf(請(qǐng)輸入要?jiǎng)h除的學(xué)生的學(xué)號(hào)：)；sea nf(%s，&id);getchar();in dex=Stude nt_SearchBy In dex(id);if (in dex=-1)printf(學(xué)生不存在!n); elseprintf(你