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在這個程序中，我想讀一個records.ssv的文件並使用結構數組打印出來。但是在打印數組之前要計算平均值。該文件包含學生姓名，身份證，考試1，考試2，項目1，項目2，平均和成績（字母，單個）。打印一個結構數組
當前在打印出eh數組和計算平均值時出現問題。我將發佈我的代碼並在下面輸出。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct {
char name[25];
int I_D[9];
int exam[2];
int project[2];
char grade;
float avg;
} STUDENT;
void printStuAry(int size, STUDENT stuAry[]);
int main(void)
{
STUDENT stuAry[5];
FILE* f = fopen("records.ssv", "r");
if (f == NULL) {
printf("Error opening file records.ssv.\n");
exit(1);
}
char line[65];
int ind = 0;
while (fgets(line, sizeof(line), f) != NULL) {
sscanf(line, "%25[^,] ; %d ; %d ; %d ; %d ; %d ; %c",
stuAry[ind].name,
&stuAry[ind].I_D,
&stuAry[ind].exam[0],
&stuAry[ind].exam[1],
&stuAry[ind].project[0],
&stuAry[ind].project[1],
&stuAry[ind].grade);
ind++;
}
// calculates average
stuAry[ind].avg = (stuAry[ind].exam[0] + stuAry[ind].exam[1] +
stuAry[ind].project[0] + stuAry[ind].project[1]) /4.0;
printf("\t+---------+-------+-------+-------+---------+----------+----------+------+\n");
printf("\t| Index |Student| ID | Exam1 | Exam2 |Project1 | Project2 | Grade|\n");
printf("\t+---------+-------+-------+-------+---------+----------+--------+--------+\n");
printStuAry(5, stuAry);
if (fclose(f) == EOF) {
printf("Error closing file records.ssv.\n");
exit(2);
}
int letter;
printf("Enter grade letter to search and q to quit");
scanf("%d", letter);
while (letter != -1){// tests for whether user wants to end program
printStuAry(5, stuAry);
}
return 0;
}
/*
*Function name: printStuAry
*
*Input Parameters: int size Student Ary
*
*Desription: prints out student Ary
*
*Return value: 0
*/
void printStuAry(int size, STUDENT stuAry[])
{
for (int i=0; i<size; i++) {
printf("\t| %d | %s | %d | %d | %d | %d | %d | %c |\n", //displays student information
i, stuAry[i].name, stuAry[i].exam[0],
stuAry[i].exam[1], stuAry[i].project[0],
stuAry[i].project[1], stuAry[i].avg,
stuAry[i].grade);
}
}
輸出
+---------+-------+-------+-------+---------+----------+----------+------+
| Index |Student| ID | Exam1 | Exam2 |Project1 | Project2 | Grade|
+---------+-------+-------+-------+---------+----------+--------+--------+
| 0 | Panzer | -544760936 | 32568 | -544762280 | 32568 | -27 | |
| 1 | Basler | -1718237240 | 32767 | -544747128 | 32568 | -104 | |
| 2 | Leaton | -1718237400 | 32767 | 118 | 0 | 9 | |
| 3 | Bishop | 4195301 | 0 | 194 | 0 | 62 | |
| 4 | Lucey | -1718237064 | 32767 | 4197349 | 0 | -96 | |
Enter grade letter to search and q to quit
正確的輸出應該是什麼：
原文：
+-------------------------+--------------+------+------+---------+---------+-------+-----+
| 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|
+-------------------------+--------------+------+------+---------+---------+-------+-----+
請妥善不知疲倦更換
sscanf(line, "%25[^,] ; %d ; %d ; %d ; %d ; %d ; %c",nt你的代碼。事實上，這讓閱讀變得更加困難。 – e0k這一切都不清楚？你是否聲稱'％c'打印了你一個數字而不是一個字符？無論哪種方式可能是結構中錯誤的值。注意，這也不像你在你的函數中打印ID。另外爲什麼是整數ID數組而不是字符串（字符數組）？更何況你只是讀取它的第一個單元格的值（I_D [0]），而不是每個數字，因爲你提到％d到sscanf –
另外，我建議檢查你的'sscanf（）'的返回值確保所有內容都被正確讀取。 – e0k