源代码：
1 #include <stdio.h> 2 #include <string.h> 3 #include <stdlib.h> 4 5 #define Score_Num 35 6 7 struct Standard 8 { 9 int A; 10 int B; 11 int C; 12 int D; 13 char Correct_Answer; 14 }; 15 16 struct Standard Standard_Answer[Score_Num];//记录标准答案 17 18 struct Stu 19 { 20 int Num;//学生学号 21 char Name[32];//学生姓名 22 char Answer[Score_Num];//准确答案 23 int Score;//学生分数 24 }; 25 26 struct Stu Student[100];//存储学生信息 27 int Stu_Num = 0;//存储学生数目 28 29 //---------------------------------统计标准答案------------------------ 30 void Standard_Num() 31 { 32 int i, j; 33 int tag; 34 for(i=0;i<Stu_Num;i++) 35 { 36 for(j=0; j<Score_Num; j++) 37 { 38 switch(Student[i].Answer[j]) 39 { 40 case 'A':Standard_Answer[j].A++;break; 41 case 'B':Standard_Answer[j].B++;break; 42 case 'C':Standard_Answer[j].C++;break; 43 case 'D':Standard_Answer[j].D++;break; 44 } 45 } 46 } 47 for(j=0; j<Score_Num; j++) 48 { 49 tag = Standard_Answer[j].A; 50 Standard_Answer[j].Correct_Answer = 'A'; 51 if(Standard_Answer[j].B > tag) 52 { 53 tag = Standard_Answer[j].B; 54 Standard_Answer[j].Correct_Answer = 'B'; 55 } 56 if(Standard_Answer[j].C > tag) 57 { 58 tag = Standard_Answer[j].C; 59 Standard_Answer[j].Correct_Answer = 'C'; 60 }if(Standard_Answer[j].D > tag) 61 { 62 tag = Standard_Answer[j].D; 63 Standard_Answer[j].Correct_Answer = 'D'; 64 } 65 } 66 } 67 //---------------------------------统计标准答案------------------------ 68 69 70 71 //------------------实现每次从文本文件中读取一行----------------------- 72 char* Read_line(FILE* f, char* line) 73 { 74 75 return line; 76 } 77 //------------------实现每次从文本文件中读取一行----------------------- 78 79 //------------------打印标准答案--------------------------------------- 80 void Standard_Print() 81 { 82 int i; 83 for(i=0; i<Score_Num; i++) 84 { 85 printf("第%d题标准答案:%c 选A的人数%d,选B的人数%d,选C的人数%d,选D的人数%d,\n", i+1, Standard_Answer[i].Correct_Answer, Standard_Answer[i].A, Standard_Answer[i].B, Standard_Answer[i].C, Standard_Answer[i].D); 86 } 87 } 88 //------------------打印标准答案--------------------------------------- 89 90 //------------------计算每个学生的成绩--------------------------------- 91 void Student_Score_Get() 92 { 93 int i, j; 94 for(i=0;i<Stu_Num;i++) 95 { 96 Student[i].Score = 0; 97 for(j=0; j<15; j++) 98 { 99 if(Student[i].Answer[j] == Standard_Answer[j].Correct_Answer) 100 Student[i].Score = Student[i].Score + 2; 101 } 102 for(j=15; j<25; j++) 103 { 104 if(Student[i].Answer[j] == Standard_Answer[j].Correct_Answer) 105 Student[i].Score = Student[i].Score + 3; 106 } 107 for(j=25; j<35; j++) 108 { 109 if(Student[i].Answer[j] == Standard_Answer[j].Correct_Answer) 110 Student[i].Score = Student[i].Score + 4; 111 } 112 } 113 } 114 //------------------计算每个学生的成绩--------------------------------- 115 116 //------------------查询学生成绩--------------------------------------- 117 void Student_Score_Look() 118 { 119 int i; 120 char name[32]={0}; 121 printf("输入要查询的学生的姓名:\n"); 122 scanf("%s", name); 123 for(i=0; i< Stu_Num; i++) 124 { 125 if(strcmp(name, Student[i].Name) == 0) 126 { 127 printf("%d %s的成绩是%d\n", Student[i].Num, Student[i].Name, Student[i].Score); 128 } 129 } 130 } 131 //------------------查询学生成绩--------------------------------------- 132 133 134 //------------------打印所有学生信息----------------------------------- 135 void Student_All_Score_Print() 136 { 137 int i; 138 for(i=0; i< Stu_Num; i++) 139 { 140 printf("%d %s的成绩是%d\n", Student[i].Num, Student[i].Name, Student[i].Score); 141 } 142 } 143 //------------------打印所有学生信息----------------------------------- 144 145 //------------------从txt中加载学生信息-------------------------------- 146 int Load_File() 147 { 148 FILE* fp; 149 int i=0; 150 int j=0; 151 char line[100][256]; 152 fp = fopen("sample.txt", "r+t"); 153 if(fp == NULL) 154 { 155 printf("文件打开失败!\n"); 156 return -1; 157 } 158 while((fgets(line[i], 256, fp)) != NULL) 159 { 160 line[i][3] = '\0'; 161 Student[i].Num = atoi(line[i]);//获取学号 162 for(j=4; j<10; j++)//获取姓名 163 { 164 if(line[i][j] != ' ') 165 { 166 Student[i].Name[j-4] = line[i][j]; 167 } 168 } 169 strcpy(Student[i].Answer, &(line[i][15]));//获取答案 170 i++; 171 Stu_Num++; 172 } 173 fclose(fp); 174 return 0; 175 } 176 //------------------从txt中加载学生信息----------------------------------- 177 178 //--------按学生成绩排序,tag=1按升序排序，tag=0按降序排序----------------- 179 void Student_All_Score_Sort(const int tag) 180 { 181 int i, j; 182 struct Stu tmp; 183 for(i=0; i<Stu_Num;i++) 184 { 185 for(j=i; j<Stu_Num;j++) 186 { 187 if (Student[i].Score < Student[j].Score) 188 { 189 memcpy(&tmp, &(Student[i]), sizeof(struct Stu)); 190 memcpy(&(Student[i]), &(Student[j]), sizeof(struct Stu)); 191 memcpy(&(Student[j]), &tmp, sizeof(struct Stu)); 192 } 193 } 194 } 195 if(tag == 1) 196 { 197 printf("按升序排列学生成绩:\n"); 198 for(i=Stu_Num-1; i>=0; i--) 199 { 200 printf("%d %s的成绩是%d\n", Student[i].Num, Student[i].Name, Student[i].Score); 201 } 202 } 203 else 204 { 205 printf("按升序排列学生成绩:\n"); 206 for(i=0; i<Stu_Num; i++) 207 { 208 printf("%d %s的成绩是%d\n", Student[i].Num, Student[i].Name, Student[i].Score); 209 } 210 } 211 } 212 213 //--------按学生成绩排序,tag=1按升序排序，tag=0按降序排序----------------- 214 215 216 //----------------------------------试卷分析------------------------------ 217 void Paper_Analyse() 218 { 219 int high=0, low=100; 220 int i; 221 int hege=0;//计算超过60分的学生人数 222 float sum=0, avr; 223 for(i=0; i<Stu_Num; i++) 224 { 225 sum = sum+Student[i].Score; 226 if(Student[i].Score > high) 227 high = Student[i].Score; 228 if(Student[i].Score < low) 229 low = Student[i].Score; 230 if(Student[i].Score >= 60) 231 hege++; 232 } 233 avr = sum/Stu_Num; 234 printf("最高分是:%d\n最低分是:%d\n平均分是:%f\n及格率是:%f\n", high, low, avr, hege*1.0/Stu_Num); 235 } 236 //----------------------------------试卷分析------------------------------ 237 238 239 int main() 240 { 241 int tag=1; 242 Load_File();//从文件中读取学生信息 243 Standard_Num();//统计标准答案 244 Student_Score_Get();//计算每个学生的分数 245 while(tag != 0) 246 { 247 tag = 0; 248 printf("**************************************************************\n"); 249 printf("1.打印标准答案\n"); 250 printf("2.根据学生姓名查询学生信息\n"); 251 printf("3.按升序打印学生成绩\n"); 252 printf("4.按降序打印学生成绩\n"); 253 printf("5.打印统计信息\n"); 254 printf("0.退出系统\n"); 255 printf("请输入你要操作的序号:\n"); 256 printf("**************************************************************\n"); 257 scanf("%d", &tag); 258 switch(tag) 259 { 260 case 1:Standard_Print();break; 261 case 2:Student_Score_Look();break; 262 case 3:Student_All_Score_Sort(0);break; 263 case 4:Student_All_Score_Sort(1);break; 264 case 5:Paper_Analyse();break; 265 case 0:return 0; 266 default:printf("输入错误!请从新输入:\n"); 267 } 268 } 269 return 0; 270 }
测试文件：
1 1 赵光 CADADCDCDACCCDACCBCAAACCDBBCBDDBBAD 2 2 罗志 CADBDCBCDADCABACBCCACACCAABCBDDBCAB 3 3 闫谷凡 CDCBDCCCDBDBBBCCBBCACACBAABCBDDBCAB 4 4 黄智博 CDCBDCCCDBDDABACBDCACACAAABCBDDBCCA 5 5 汪昇朗 CACBDCBCDBDCBBACBDCACCCAAABCBDDBCAB 6 6 刘奋伦 CDDBDCDCDBDAABBDDBCBCACAAABCBDDBCAB 7 7 李磊鹏 CADBDABCDBDCABCCBDBACCCAABBCBDDBCAB 8 8 高卫 DADBDDBCDBDCBCCCBDCBCACBAABCBDDADAA 9 9 周鸿韵 CADBDCCBCADCBCDCABCCCACADBBCDCDBDAA 10 10 杨建 CBDBDBBCDBDBBCCABDBACACBABBCBDAADAB 11 11 李海凯 CADBDCACDBDCBDADDADABAACBBBCBDDBCAB 12 12 李冲谱 CADBDCCCDBDCBBACBBCACACAABBCBDDBCAB 13 13 邰杨敏 CACCDCBCDBDCBCCCBDCDCACABBBCBDDBCAB 14 14 姚畅生 CBDBDCDDDBDCDCCBBDCDCCCADABCBDDACAA 15 15 禤微 CADBDABCDCDCBBCBBDBACCAAABBCBDDBCAB 16 16 丁宁 CADADCBCDBDCBDDCDCCABACABABCBDDBCDD 17 17 乔梦进 CADDDABCDBDCBBCABDBACACBDBBCBDDBCAB 18 18 张华 CADBDCBCDBDCBBCACDCACACAABBCBDDBCAB 19 19 代怡康 CADBDABBDBDCBCDABDCBCCCAAABCBDDBCAB 20 20 张文剑 CABDACCCDBDCBCCCBCDBCCABBDBBCCDBCCD 21 21 吴汉 AADBACCCDBDABBCCBDCACACABABCBDDBCAB 22 22 刘亚 CADBBABCDADBBCCADBBACACADABCBDDBCAB 23 23 吴璐 CADBDBCCDBDCBBCCBCBACACAABBCBDDBCAB 24 24 唐金 CACBDBACDBDBBCADDCCAAACBCABCBDDBCAB 25 25 刘秋 CADCDABCDADCBCDADDBCCAAABBBCBDDBCAB 26 26 徐文 CADBDDBCDBDCBBAABDBACCCADBBCBDDACAB 27 27 孙育夫 CABDDCBCDBDCBBDCBDCAACCCDBBCBDDBCCA 28 28 毛东 CDABDDBCDBDCBCCADDCACCCAABBCBDDBCAB 29 29 陈环勇 CADBDABCDBDCBBACCABACCCAABBCBDDBCCB 30 30 郑彪爽 CBDBCCDBBAACBADBCBDDAACCDBBCCDDBCAB 31 31 赵志龙 CADBDDBCDBDABBDABDBACCCBAABCBDDBCAB 32 32 梁傲朝 CADBDABCDBDBBBDCDDCACAAADBBCBDDBCAA 33 33 许同雷 CADBDABCDBDABBBCBDCDCACAABBCBDDBCAB 34 34 徐彦楠 CADBDCBCDBDCBBACDDCACCAABABCBDDBCAB 35 35 罗建磊 CADBDCCCDBDCBCDADBCAACACBBBCBDDBBAD 36 36 曾少林 CBDBDCBCBADDCCADDABACAABCBBCADDBAAB 37 37 郭磊杰 CADBDBBCDACCABDCDDBBCAADBBBCBDDBCAD 38 38 閤道炜 CADBDCBCDBDBADBCABDCCACABBBCBDDADCD 39 39 胡风波 DADBDDBCDBDCBBCCBDBAACCABBBCBDDACAB 40 40 张兆 CDDBDADCDBDCBCCDDDBACAACDBBCBDDBDAB 41 41 吴雪 BDDBDCBCDBDCBDDCBDCACAAAABBCBDDBCCA 42 42 卫曦群 CADBDDACDBDCBBCCDCCACCCAABBCBDDBCCA 43 43 郭文雪 CBDBDDBCDBDBCCCCBBCACAAAABBCBBDBCCB 44 44 黄甘亮 CBDBDCBCDBDBADBCDDCCAACADABCDDDBCBA 45 45 苏子淇 CADBDCBCDBCCBCACADBACACDAABCBCDACCA 46 46 王樊聪 CBDBDCBCDBDCABABBDCACCCAAABCBDDACAB 47 47 肖勇杰 CADBDCBCDBDCBBCCBDCACCCAABBCBDDBCAB 48 48 石小 CCDBDDCCDBDBBBCCCBCAAAADCBBCBDDBCAB 49 49 刘大远 CADBDCCCDBDBADCCADCCCAAAAABCADDCCCA 50 50 陈世怡 CADBDCCCDBDABCCCDDCAAAACAABCADDACCA 51 51 王鹏康 CADBDCDCDCCACCDDBDCABAAACBBCBDDBCAB 52 52 解欣琦 BBDBADCDDBACADBACBDDAADABABCACDBCAA 53 53 刘周雯 CADBDCCCDBDCBCACBACACCCADABCBDDACAB 54 54 代博涛 CADBDBBCDBDBBCDCDABDCCABBABCBDDACAB 55 55 刘亚明 CADBDCDCDBDABBAABABACACAABBCBDDBCAB 56 56 韩建昊 CADBDBBCDBDCBBCBBDBACCCAABBCBDDBCAB 57 57 于磊思琪 CBDCDCCCDBDBBDCAACDACAAADBBBBDABCCA 58 58 王治 DADBDBBCDBDCBBCABDBCCCCAABBCBDDBCAD 59 59 刘春东 CADBDCBCDBDBBBCCADDACAAAAABCBDDBCAB 60 60 魏恒宇 CACBDCBCDBDCBBDCBDBACACBABBCBCDBCAB 61 61 陈春迪 CADBDCBCDBDCBBCCBBBACAABBBBCBDDBCCD 62 62 贾汝远 CADBDBBCDBDBCADABDCBAACCBABCACDBCAB 63 63 韩全彤 CADBDCBCDBDCBBCCBDBACACAABBCBDDCCAB 64 64 付彬祺 CADBDCBCDADABBDCDDBACACBABBCBDDBCBB 65 65 王泽文 CADBBCBCDBDACDBBBBCDBAADBBBCBCDACAB 66 66 胡富南 CADBDCDCDACCBDCCCABACCCDBBBCBDDBCAB 67 67 肖秋来 CADDDCBCDBCCBCACDCBABACCAABBBDDACCA 68 68 周晓 CADBDABCDADCBCCDBDBACCCAABBCBDDBCAB 69 69 王奕敏 CADBDCBCDBDCBBCABDBACCCAABBCBDDBCAB 70 70 徐钰英 DADBDABCDBDCABCCBDBBCCCABBBCBDCBCAB 71 71 陈赢 CDDBAABCBADABCCCDBCACACDAABCBDDBCAB 72 72 杨君 CADBDDACCBDCBDDCBCCCCCCCCBBCBDDBCAB 73 73 李清雪 DADBDCBCDBDCABDCBDCACCCAABBCBDDBCAB 74 74 周俊蒙 CADBCDBCCCDCBDBCBCCACACBBBBCBDDACAB 75 75 李梦 CACBDCBCDBDCBAACBDCACACCBABCBDDBCAB 76 76 夏焕宏 CBDBDCCCDADABBDCBCCAACAADBBBBDDBCDD 77 77 徐鑫强 CADBDCBCDBDAAADCBBCABACAABBCBDDBCAB 78 78 娄克瑞 CACBDBBCCBDCBBDABACACAAAAABCBDABCAB 79 79 董泽光 CDDCDABCDBDDBCDDDCBACACBBABCBDDBBCD 80 80 黄念龙 CACBDABCDBDABBCCBDCACCCAABBCBDDBCAB 81 81 林世 CADBDCBCDBDABAACBDBACCCAABBCBDDBCAB 82 82 王雪 CADBDCBCDBDCBBCABDBACACAABBCBDDBCAB 83 83 何璐 CADCDBBCDBDCCBACBDBCCACAABBCBDDBCAB 84 84 吴一 CBDBDCACBBDCBCACBDCCCACADBBCBDDBCAB 85 85 龚文杰 CADBDCBCDBDCBBCBBDCACCCBAABCBDDBCAB 86 86 王志媛 DAABDCACDBDCCCCCBDCAAACCCABCACDBCCA 87 87 段靖章 CADBDCBCDCDCBBDABDBACAACABBCBCDBCAB 88 88 胡大 CADBDCCCDBDBBDDCBDDCCACAAABBBCDBCBB 89 89 黄利伟 CADBDCBCDBDCABDCCDBACACCADBCBDDBCAB 90 90 张文源 CADBDCBCDBDCBBDABDBACCCAABBCBDDBCAB 91 91 林涛 CADBDBBCDBDCBBCABDBACCCAABBCBDDBCAB