随笔- 114 文章- 2 评论- 1 阅读- 1821

学生管理系统

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

#include<iostream>
#include<vector>
#include<windows.h>
using namespace std;
int a=999;
int b=0;
bool c=false;
struct student{
    string name;
    int age;
    int card;
    int grade;
}s;
void ka(){
    cout<<"学生管理系统:"<<endl;
    cout<<"1.新建学生信息"<<endl;
    cout<<"2.查找学生信息"<<endl;
    cout<<"3.修改学生信息"<<endl;
    cout<<"4.删除学生信息"<<endl;
    cout<<"5.退出系统"<<endl;
}
vector<student> insert(vector<student> v){
    cout<<"请输入学生姓名:";
    cin>>s.name;
    cout<<"请输入学生年龄:";
    cin>>s.age;
    cout<<"请输入学生年级:";
    cin>>s.grade;
    cout<<"你的学号是:";
    a++;
    s.card=a;
    cout<<s.card;
    v.push_back(s);
    Sleep(500);
    return v;
}
vector<student> find(vector<student> v){
    while(1){
        cout<<"你要用什么形式查找:"<<endl;
        cout<<"1.学生卡号"<<endl;
        cout<<"2.学生年龄"<<endl;
        cout<<"3.学生姓名"<<endl;
        cout<<"4.退出"<<endl;
        cin>>b;
        if(b==4){
            break;
        }
        switch(b){
        case 1:{
            cin>>b;
            for(int i=0;i<v.size();i++){
                if(v[i].card==b){
                    cout<<"学生姓名:";
                    cout<<v[i].name<<endl;
                    cout<<"请输入学生年龄:";
                    cout<<v[i].age<<endl;
                    cout<<"请输入学生年级:";
                    cout<<v[i].grade<<endl;
                    Sleep(2000);
                    c=true;
                }
            }
        if(c==false){
            cout<<"没找到";
            Sleep(500);
        }
        break;
        }
         
         
        case 2:{
            cin>>b;
            for(int i=0;i<v.size();i++){
                if(v[i].age==b){
                    cout<<"学生姓名:";
                    cout<<v[i].name<<endl;
                    cout<<"请输入学生年龄:";
                    cout<<v[i].age<<endl;
                    cout<<"请输入学生年级:";
                    cout<<v[i].grade<<endl;
                    Sleep(2000);
                    c=true;
                    }
                }
            if(c==false){
                cout<<"没找到";
                Sleep(500);         
                }
            break;
            }
        case 3:{
        string d;
        cin>>d;
        for(int i=0;i<v.size();i++){
            if(v[i].name.find(d)!=string::npos){
                cout<<"学生姓名:";
                cout<<v[i].name<<endl;
                cout<<"请输入学生年龄:";
                cout<<v[i].age<<endl;
                cout<<"请输入学生年级:";
                cout<<v[i].grade<<endl;
                Sleep(2000);
                c=true;
            }
        }
        if(c==false){
            cout<<"没找到";
            Sleep(500);
        }
        break;
        }
          
        default :{
          
        break;
        }
        }
        system("cls");
}
  
    return v;
}
vector<student> change(vector<student> v){
    for(int i=0;i<v.size();i++){
        if(v[i].card==b){
        while(1){
            c=true;
            cout<<"你要修改什么:"<<endl;
            cout<<"1.学生姓名"<<endl;
            cout<<"2.学生年龄"<<endl;
            cout<<"3.学生年级"<<endl;
            cout<<"4.退出"<<endl;
            cin>>b;
            if(b==4){
                break;
            }
        switch(b){
            case 1:{
                cout<<v[i].name<<endl;
                cin>>v[i].name;
                break;
            }
            case 2:{
                cout<<v[i].age<<endl;
                cin>>v[i].age;
                break;
            }
            case 3:{
                cout<<v[i].grade<<endl;
                cin>>v[i].grade;
                break;
            }
        default:{
             
             
        break;
        }
        }
        system("cls");
        }
      
    }
    }
    if(c==false){
        cout<<"没找到";
        Sleep(500);
    }
      
      
    return v;
}
int main(){
    vector<student> v;
    while(1){
        ka();
        int n;
        cin>>n;
        if(n==5){
            break;
        }
    switch(n){
        case 1:{
            v=insert(v);
            break;
        }
        case 2:{
            find(v);
            break;
        }
        case 3:{
            cout<<"请输入学生卡号:";
            cin>>b;
            change(v);
            break;
        }
        case 4:{ 
            break;
        }
    }
        system("cls");
    }
      
    return 0;
  
}