【发布时间】：2016-12-02 03:06:46
【问题描述】：
排序未正确打印出来，排序可能是错误的。我也不确定如何放置每个字符串的平均成绩。 这是示例输出：
Original:
+-------------------------+--------------+------+------+---------+---------+-------+-----+
| Student Name|Identification|Exam 1|Exam 2|Project 1|Project 1|Average|Grade|
+-------------------------+--------------+------+------+---------+---------+-------+-----+
| Holtkamp, Norman| N21102485| 83| 61| 62| 78| 71.00| C|
| Bellomy, Shavonda| N94185259| 74| 96| 80| 98| 87.00| B|
| Clutter, Loris| N68760306| 83| 68| 93| 70| 78.50| C|
| Rountree, Edythe| N76813896| 98| 91| 90| 81| 90.00| A|
| Waldeck, Marylee| N44293872| 88| 100| 70| 87| 86.25| B|
+-------------------------+--------------+------+------+---------+---------+-------+-----+
Sorted:
+-----+-------------------------+--------------+------+------+---------+---------+-------+-----+
|Index| Student Name|Identification|Exam 1|Exam 2|Project 1|Project 1|Average|Grade|
+-----+-------------------------+--------------+------+------+---------+---------+-------+-----+
| 1 | Rountree, Edythe| N76813896| 98| 91| 90| 81| 90.00| A|
| 2 | Bellomy, Shavonda| N94185259| 74| 96| 80| 98| 87.00| B|
| 3 | Waldeck, Marylee| N44293872| 88| 100| 70| 87| 86.25| B|
| 4 | Clutter, Loris| N68760306| 83| 68| 93| 70| 78.50| C|
| 5 | Holtkamp, Norman| N21102485| 83| 61| 62| 78| 71.00| C|
+-----+-------------------------+--------------+------+------+---------+---------+-------+-----+
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
//Struct groups each line in the file
struct gradesRecord
{
int iIndex; // index on the file
char cStudentName[26]; // student name field
char iStudentINDnum[9]; // 'Student id ' field
int iExamGrouped[2]; // 'Exam 1'..'Exam 2' fields
int iProjectGrouped[2];
float fAverage;
char cStudentGD; // 'Grade' field
};
void printUnsortedStringFromFile(int amount, struct gradesRecord A[]);
void printSortedStringFromFile(int amount, struct gradesRecord A[]);
void flushScanf();
int main()
{
FILE* spData = fopen("records.ssv", "r");
int ch, number_of_lines = 0;
do
{
ch = fgetc(spData);
if (ch == '\n')
number_of_lines++;
} while (ch != EOF);
if (ch != '\n' && number_of_lines != 0)
number_of_lines++;
fclose(spData);
printf("There are %d lines in file records.ssv . \n", number_of_lines);
int amount = number_of_lines;
struct gradesRecord A[amount];
printUnsortedStringFromFile(amount, A );
printSortedStringFromFile(amount, A );
//flushScanf();
return 0;
}
/*
* Function Name: printUnsortedStringFromFile
*
* Input Parameters: takes array A
*
* Description: This fuction prints the original list that was unsorted in grades.csv
*
* Return Value: void
*/
void printUnsortedStringFromFile(int amount, struct gradesRecord A[amount])
{
FILE *spData;
spData = fopen("records.ssv", "r");
if(spData == NULL)
{
fprintf(stderr, "Error opening the file records.ssv.\n");
exit(1);
}
printf("+---------------------+--------------+------+------+---------+---------+-----+\n");
printf("| Student Name|Identification|Exam 1|Exam 2|Project 1|Project 2|Grade|\n");
printf("+---------------------+--------------+------+------+---------+---------+-----+\n");
char sLine[amount]; //local string to read one row
int j = 0; //storage index
while((fgets(sLine, amount, spData)) != NULL)
{
sscanf(sLine, "%20[^;] ; %9[^;] ; %5d ; %5d ; %5d ; %5d ; %c",
A[j].cStudentName, A[j].iStudentINDnum, &(A[j].iExamGrouped[0]), &(A[j].iExamGrouped[1]),
&(A[j].iProjectGrouped[0]), &(A[j].iProjectGrouped[1]), &(A[j].cStudentGD));
if(strcmp(A[j].cStudentName, " ")> 0){
printf("| %20s| %9s| %5d| %5d| %5d| %5d| %c| \n",
A[j].cStudentName, A[j].iStudentINDnum, A[j].iExamGrouped[0], A[j].iExamGrouped[1],
A[j].iProjectGrouped[0], A[j].iProjectGrouped[1], A[j].cStudentGD);
}
j++; // next row
}
printf("+---------------------+--------------+------+------+---------+---------+-----+\n");
if (fclose(spData) == EOF)
{
fprintf(stderr, "Error closing the file records.ssv. \n");
exit(2);
}
}
/*
* Function Name: printSortedStringFromFile
*
* Input Parameters: takes int amount, struct gradesRecord A
*
* Description: This function prints the sorted version of the file grades.csv omitting
* the exam values and giving each string a index number
*
* Return Value: void
*/
void printSortedStringFromFile(int amount, struct gradesRecord A[amount])
{
FILE *spData;
spData = fopen("records.ssv", "r");
if(spData == NULL)
{
fprintf(stderr, "Error opening the file grades.csv.\n");
exit(1);
}
char sLine[amount];
int iLine = 0, iRow;
int x;
struct gradesRecord grRow;
while((fgets(sLine, amount, spData)) != NULL)
{
// extract one Row and store it into grRow
sscanf(sLine, "%20[^;] ; %9[^;] ; %5d ; %5d ; %5d ; %5d ; %2.2f ; %c",
grRow.cStudentName, grRow.iStudentINDnum, &(grRow.iExamGrouped[0]), &(grRow.iExamGrouped[1]),
&(grRow.iProjectGrouped[0]), &(grRow.iProjectGrouped[1]), &(grRow.fAverage), &(grRow.cStudentGD));
// keep the line index of that row
grRow.iIndex = iLine;
// target loop = Selection sort algorithm
for (iRow = 0; iRow < iLine - 1; iRow++){
for(x = iRow + 1; x < iLine; x++){
if (A[iRow].cStudentGD < A[x].cStudentGD) {
struct gradesRecord tmp = A[iRow];
A[iRow] = A[x];
A[x] = tmp;
}
}
}
int j = 0;
printf("+-----+---------------------+--------------+------+------+---------+---------+-------+-----+\n");
printf("|Index| Student Name|Identification|Exam 1|Exam 2|Project 1|Project 2|Average|Grade|\n");
printf("+-----+---------------------+--------------+------+------+---------+---------+-------+-----+\n");
int index;
while (j < amount - 1)
{
index = j+1;
printf("| %4d| %20s| %9s| %5d| %5d| %5d| %5d| %2.2f| %c| \n",
index, A[j].cStudentName, A[j].iStudentINDnum, A[j].iExamGrouped[0], A[j].iExamGrouped[1],
A[j].iProjectGrouped[0], A[j].iProjectGrouped[1], A[j].fAverage, A[j].cStudentGD);
j++;
}
printf("+----+---------------------+--------------+------+------+---------+---------+-----+\n");
if (fclose(spData) == EOF)
{
fprintf(stderr, "Error closing the file records.ssv. \n");
exit(2);
}
}
}
这里是“records.ssv”的信息
装甲，莱利亚；N58288536；89；82；91；65；B 詹妮弗·巴斯勒；N42495906；74；71；87；91；B 利顿，辛迪；N66735910；67；93；76；79；C 卡罗琳主教;N85576519;86;94;92;69;B Lucey, Callie;N55890919;86;84;88;87;B 花呢，米尔塔;N94974972;62;95;85;92;B Fontenot，玫瑰花结；N44585447；98；62；74；74；C 霍尔特坎普，诺曼；N21102485；83；61；62；78；C 贝洛米，Shavonda;N94185259;74;96;80;98;B 杂波，洛里斯;N68760306;83;68;93;70;C 朗特里, Edythe;N76813896;98;91;90;81;A Waldeck, Marylee;N44293872;88;100;70;87;B 普特南, Tuyet;N82771281;69;99;68;67;C 迈克尔斯，阿内特；N33948917；86；65；99；64；C Strawder, Wendolyn;N05586646;86;64;80;97;B 蒙图法尔，梅尔文；N36545740；80；61；74；92；C Fey, Letha;N61908241;73;89;71;68;C 德鲁纳，沃恩；N74322300；94；69；67；60；C 韦弗，玛格丽塔；N37176367；95；92；95；70；B 白金汉，莉娜；N87562246；95；64；89；71；C 弗里德利，维罗纳；N53223806；67；83；71；61；C Ebarb, Gladis;N66138130;89;70;87;90;B Tichenor, Monika;N40314334;88;62;62;100;C 多兰，中篇小说；N24182986；78；62；65；71；D Relyea, Mazie;N64652923;89;95;72;76;B 肯德尔，罗马；N22064372；91；84；72；88；B 布兰诺克，亨丽埃特；N19795353；67；92；63；90；C 莱恩，克林特；N83838870；88；83；82；77；B Reichenbach, Sharleen;N02253867;81;96;91;73;B 埃弗斯，汉娜；N05833153；75；79；75；98；B 里贾纳，阿马尔；N52372967；95；73；73；89；B 莱特勒，德斯蒙德；N81006603；75；66；61；71；D 约曼，在;N30566266;89;99;98;89;A Garling, Nereida;N05192538;89;92;74;99;B 汉娜，阿松塔；N39624931；91；80；72；80；B 丹科，米尼翁；N47365488；79；67；86；65；C 乌里希，圣女；N57019166；70；82；72；88；C Czapla, Ermelinda;N38233556;93;83;60;87;B 哈普，米娜；N46726472；84；98；60；66；C 萨德斯，德洛里斯；N88538002；86；71；82；82；B 巴勒莫，肯纳；N44857147；72；69；83；75；C 维德曼，乌莎；N29831009；86；78；89；81；B 赛义德，露丝；N47933985；78；62；99；99；B 布瑞尔，科林；N75299461；77；85；99；99；A 埃迪·赫克特；N58264115；92；96；96；89；A 波利，丹佛；N77063394；99；95；65；95；B 韦弗，布兰奇；N59717716；66；80；89；80；C 基布尔，格林达；N68212959；94；95；66；94；B 柯克，威利斯；N17878125；71；60；87；79；C Livesay, Arie;N91011529;89;60;60;84;C【问题讨论】：
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可以为编程语言添加标签吗？我假设它是“C”。
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是的，这是 C，我认为问题在于选择排序，但我不知道该怎么办。
标签： c arrays sorting structure