1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<string.h> 4 5 int readstudents(struct students stu[]); //读取学生信息 6 int readsexcode(struct sexcode sex[]); //读取性别代码 7 int readcollegecode(struct collegecode colle[]); //读取学院代码 8 void transform(struct students stu[],struct sexcode sexy[],struct collegecode colle[],int a,int b,int c); //录入 9 void namesort(struct students stu[],int a); //按照姓名排序 10 void averagesort(struct students stu[],int a); //平均分排序 11 void searchcollege(struct students stu[],int a); //按学院搜索学生 12 void namesearch(struct students stu[],int a); //按名字搜索 13 void printstudent(struct students stu[],struct sexcode sex[],struct collegecode colle[],int a,int b,int c); //输出 14 void change(struct students stu[],int a); 15 int passwordfun(); 16 void passwordchange(); 17 void averagefun(struct students stu[],int a); 18 19 struct students{ 20 int num; 21 char name[20]; 22 int sexnum; 23 char sex[4]; 24 int collegenum; 25 char college[20]; 26 int score[10]; 27 float average; 28 }; 29 struct sexcode{ 30 int sexnum; 31 char sex[4]; 32 }; 33 struct collegecode{ 34 int collegenum; 35 char college[20]; 36 }; 37 38 39 int main() 40 { 41 int a,b,c; 42 int choice; 43 struct students stu[100]; 44 struct sexcode sexy[2]; 45 struct collegecode colle[10]; 46 int t = passwordfun(); 47 if(t == 0){ 48 printf("请使用正确密码重新登陆程序！ "); 49 return 0; 50 } 51 while(1){ 52 system("cls"); 53 printf("***********学生成绩系统菜单************ * 1. 原始文件读取 * * 2. 按姓名排序，输出 * * 3. 按平均成绩排序，输出 * * 4. 输出给定学院学生 * * 5. 修改给定学生成绩信息 * * 6. 按姓名查询学生，输出 * * 7. 修改系统密码 * * 0. 返回上一级菜单 * *************************************** "); 54 scanf("%d",&choice); 55 switch(choice){ 56 case 1: system("cls"); 57 a = readstudents(stu); 58 b = readsexcode(sexy); 59 c = readcollegecode(colle); 60 transform(stu,sexy,colle,a,b,c); 61 averagefun(stu,a); 62 printf("原始文件读取完毕！ 0. 返回上一级菜单 "); 63 scanf("%d",&choice); 64 if(choice == 0) break; 65 case 2: system("cls"); 66 namesort(stu,a); 67 printstudent(stu,sexy,colle,a,b,c); 68 printf(" 0. 返回上一级菜单 "); 69 scanf("%d",&choice); 70 if(choice == 0) break; 71 case 3: system("cls"); 72 averagesort(stu,a); 73 printstudent(stu,sexy,colle,a,b,c); 74 printf(" 0. 返回上一级菜单 "); 75 scanf("%d",&choice); 76 if(choice == 0) break; 77 case 4: system("cls"); 78 searchcollege(stu,a); 79 printf(" 0. 返回上一级菜单 "); 80 scanf("%d",&choice); 81 if(choice == 0) break; 82 case 5: system("cls"); 83 change(stu,a); 84 printf("修改成功！ "); 85 printf(" 0. 返回上一级菜单 "); 86 scanf("%d",&choice); 87 if(choice == 0) break; 88 case 6: system("cls"); 89 namesearch(stu,a); 90 printf(" 0. 返回上一级菜单 "); 91 scanf("%d",&choice); 92 if(choice == 0) break; 93 case 7: system("cls"); 94 passwordchange(); 95 printf(" 0. 返回上一级菜单 "); 96 scanf("%d",&choice); 97 if(choice == 0) break; 98 case 0: system("cls"); 99 printf("欢迎使用，下次再见！ "); 100 system("pause"); 101 exit(0); 102 } 103 } 104 return 0; 105 } 106 int readstudents(struct students stu[]) //读取学生信息 107 { 108 int i = 0; 109 FILE *fp; 110 fp = fopen("D:\abc\Student_Info.txt","r+"); 111 if(fp == 0){ 112 printf("can not open this file "); 113 exit (0); 114 } 115 fscanf(fp,"%d",&stu[i].num); 116 while(!feof(fp)){ 117 fscanf(fp,"%s%d%d",stu[i].name,&stu[i].sexnum,&stu[i].collegenum); 118 for(int j = 0 ;j < 10; j++ ){ 119 fscanf(fp,"%d",&stu[i].score[j]); 120 } 121 i++; 122 fscanf(fp,"%d",&stu[i].num); 123 } 124 fclose(fp); 125 return i; 126 } 127 int readsexcode(struct sexcode sexy[]) //读取学生性别信息 128 { 129 int i = 0; 130 FILE *fp; 131 fp = fopen("D:\abc\S_Info.txt","r"); 132 if(fp == 0){ 133 printf("can not open this file "); 134 exit (0); 135 } 136 fscanf(fp,"%d",&sexy[i].sexnum); 137 while(!feof(fp)){ 138 fscanf(fp,"%s",sexy[i].sex); 139 i++; 140 fscanf(fp,"%d",&sexy[i].sexnum); 141 } 142 fclose(fp); 143 return i; 144 } 145 int readcollegecode(struct collegecode colle[]) //读取学生学院信息 146 { 147 int i = 0; 148 FILE *fp; 149 fp = fopen("D:\abc\C_Info.txt","r"); 150 if(fp == 0){ 151 printf("can not open this file "); 152 exit (0); 153 } 154 fscanf(fp,"%d",&colle[i].collegenum); 155 while(!feof(fp)){ 156 fscanf(fp,"%s",colle[i].college); 157 i++; 158 fscanf(fp,"%d",&colle[i].collegenum); 159 } 160 fclose(fp); 161 return i; 162 } 163 void averagefun(struct students stu[],int a) //平均分 164 { 165 for(int i = 0; i < a; i++){ 166 int sum = 0; 167 for(int j = 0; j < 10; j++){ 168 sum = sum + stu[i].score[j]; 169 } 170 stu[i].average = 1.0 * sum / 10; 171 } 172 return ; 173 } 174 void namesort(struct students stu[],int a) //按姓名排序 175 { 176 for(int i = 0; i < a-1; i++){ 177 for(int j = i+1; j < a ; j++){ 178 if(strcmp(stu[i].name,stu[j].name) < 0){ 179 struct students temp = stu[i]; 180 stu[i] = stu[j]; 181 stu[j] = temp; 182 } 183 } 184 } 185 return ; 186 } 187 void averagesort(struct students stu[],int a) // 按平均分排序 188 { 189 for(int i = 0; i < a-1; i++){ 190 for(int j = i+1; j < a ; j++){ 191 if(stu[i].average < stu[j].average){ 192 struct students temp = stu[i]; 193 stu[i] = stu[j]; 194 stu[j] = temp; 195 } 196 } 197 } 198 return ; 199 } 200 void printstudent(struct students stu[],struct sexcode sexy[],struct collegecode colle[],int a,int b,int c) //输出信息 201 { 202 for(int i = 0;i < a; i++){ 203 printf("%d%8s%4s%12s",stu[i].num,stu[i].name,stu[i].sex,stu[i].college); 204 for(int j = 0; j < c; j++){ 205 printf("%4d",stu[i].score[j]); 206 } 207 printf("%7.2f ",stu[i].average); 208 } 209 return ; 210 } 211 void transform(struct students stu[],struct sexcode sexy[],struct collegecode colle[],int a,int b,int c) //修改信息 212 { 213 for(int i = 0; i < a; i++){ 214 for(int j = 0; j < b; j++){ 215 if(stu[i].sexnum == sexy[j].sexnum){ 216 strcpy(stu[i].sex,sexy[j].sex); 217 break; 218 } 219 } 220 for(int j = 0; j < c; j++){ 221 if(stu[i].collegenum == (colle[j].collegenum - 1)){ 222 strcpy(stu[i].college,colle[j].college); 223 break; 224 } 225 } 226 } 227 } 228 229 void searchcollege(struct students stu[],int a) //查找学院并输出 230 { 231 char collegename[20]; 232 printf("请输入需要查找的学院的名称： ") ; 233 scanf("%s",collegename); 234 for(int i = 0;i < a; i++){ 235 if(strcmp(stu[i].college,collegename) == 0){ 236 printf("%d%8s%4s%12s",stu[i].num,stu[i].name,stu[i].sex,stu[i].college); 237 for(int j = 0; j < 10; j++){ 238 printf("%4d",stu[i].score[j]); 239 } 240 printf("%7.2f ",stu[i].average); 241 } 242 } 243 return ; 244 } 245 void namesearch(struct students stu[],int a) //按姓名查找 246 { 247 printf("请输入需要查找的学生的姓名： "); 248 char name[20]; 249 scanf("%s",name); 250 for(int i = 0;i < a; i++){ 251 if(strcmp(stu[i].name,name) == 0){ 252 printf("%d%8s%4s%12s",stu[i].num,stu[i].name,stu[i].sex,stu[i].college); 253 for(int j = 0; j < 10; j++){ 254 printf("%4d",stu[i].score[j]); 255 } 256 printf("%7.2f ",stu[i].average); 257 } 258 } 259 return ; 260 } 261 void change(struct students stu[],int a) //按名字搜索修改分数 262 { 263 char name[20]; 264 printf("请输入需要修改成绩的学生的姓名： "); 265 scanf("%s",name); 266 printf("请输入改学生各科成绩，不需要修改的按原样输入： "); 267 for(int i = 0;i < a; i++){ 268 if(strcmp(stu[i].name,name) == 0){ 269 for(int j = 1; j <= 10; j++){ 270 printf("第%d门成绩: ",j); 271 scanf("%d",&stu[i].score[j-1]); 272 printf(" "); 273 } 274 } 275 } 276 int i = 0; 277 FILE *fp; 278 fp = fopen("D:\abc\Student_Info.txt","w"); 279 if(fp == 0){ 280 printf("can not open this file "); 281 exit (0); 282 } 283 while(i<100){ 284 fprintf(fp,"%d %s %d %d",stu[i].num,stu[i].name,stu[i].sexnum,stu[i].collegenum); 285 for(int j = 0 ;j < 10; j++ ){ 286 fprintf(fp," %d",stu[i].score[j]); 287 if(j == 9){ 288 fprintf(fp," "); 289 } 290 } 291 i++; 292 } 293 fclose(fp); 294 return ; 295 } 296 int passwordfun() //密码 297 { 298 char password_1[20],password_2[20],password_3[20]; 299 int i = 0; 300 FILE *fp; 301 fp = fopen("D:\abc\password.txt","r"); 302 if(fp == 0){ 303 printf("can not open this file "); 304 exit (0); 305 } 306 fscanf(fp,"%s",password_2); 307 fclose(fp); 308 if(password_2[i] == ' '){ //当检测到密码文本为空时 309 printf("欢迎使用学生成绩管理系统！ 首次使用系统，您可以直接进入主菜单，进入主菜单后请及时修改密码！ "); 310 system("pause"); 311 return 1; 312 } 313 else 314 { 315 printf("请输入系统密码： "); 316 317 //保存输入的密码 318 char s[20]; 319 int t,n_,x; 320 for(x=0;x<20;x++){ 321 s[x]=getch(); 322 if(s[x]==' ') break; 323 printf("*"); 324 } 325 s[x]=' '; 326 for(t=0;t<20;t++){ //将输入的密码存放在password_1中 327 password_1[t]=s[t]; 328 } 329 for(i = 0; password_2[i] != ' '; i++){ 330 if(password_2[i] <= 127 && password_2[i] >= 4){ //password_2为真实密码 331 password_3[i] = password_2[i] - 3; //密码密文加密（+3） 332 }else{ 333 password_3[i] = 127 - password_3[i]; 334 } //password_3为按算法处理后的真实密码 335 } 336 password_3[i] = ' '; 337 if(strcmp(password_1,password_3) == 0){ 338 return 1; 339 }else{ 340 printf("密码错误！ 程序结束！请使用正确密码重新登入程序！ "); 341 system("pause"); 342 return 0; 343 } 344 } 345 } 346 void passwordchange() //密码修改 347 { 348 FILE *fp; 349 char newpassword_1[20]; 350 char newpassword_2[20]; 351 int i = 0; 352 printf("请输入新的密码： "); 353 scanf("%s",newpassword_1); 354 for(i = 0; newpassword_1[i] != ' '; i++){ 355 if(newpassword_1[i] + 3 <= 127){ 356 newpassword_2[i] = newpassword_1[i] + 3; 357 }else{ 358 newpassword_2[i] = newpassword_1[i] + 3 -127; 359 } 360 } 361 newpassword_2[i] = ' '; 362 fp = fopen("D:\abc\password.txt","w"); 363 if(fp == 0){ 364 printf("can not open this file "); 365 exit (0); 366 } 367 fprintf(fp,"%s",newpassword_2); 368 fclose(fp); 369 printf("密码修改成功！ "); 370 return ; 371 }