Question

我的代码在C中读取文件。它显示文件，平均分数，最高分数以及获得最高分的所有学生的姓名。考试分数（0-100格式到1位小数并使用字段宽度的列）存储在一个数组中，名称（名称和姓氏限制为15个字符）存储在一个二维字符数组中，即与得分数组平行。我的问题是：

1）代码没有正确读取（打印）文件（我认为与fscanf和数组有关）。

2）我的两个功能不打印结果。

任何建议都表示赞赏，谢谢。

#include "tools.h"
#define MAX 30                  // Maximum number of students
int computeMax(double stSco[], int numSt);  // Gets the average and highest
                                            // score
void outputBest(double num[], char nameHg[][15], int hgPl, int totStu);

int main()
{
    double score[MAX];
    char name[MAX][15];
    char fileName[80];
    int k, count = 0, hgCt;
    stream dataFile;
    banner();
    printf("Type the name of file you want to read\n");
    scanf("%79[^/n]", fileName);
    dataFile = fopen(fileName, "r");
    if (dataFile == NULL)
    {
        fatal("Cannot open %s for input", fileName);
    }
    while (!feof(dataFile))
    {
        fscanf(dataFile, "(%lg,%s)", &score[k], &name[k]);
        printf("%6.1f %s\n", score[k], name[k]);
        count++;                // It counts how many students there are
    }
    hgCt = computeMax(score, count);    // Stores the value sent by the
                                        // function
    outputBest(score, name, hgCt, count);
    fclose(dataFile);
    bye();
    return 0;
}

int computeMax(double stSco[], int numSt)
{
    int k, maxScore = 0, sum = 0;
    double maximum = 0, average = 0;

    for (k = 0; k < numSt; k++)
    {
        sum += stSco[k];        // It sums all scores
        if (stSco[k] > maximum)
        {
            maximum = stSco[k];
            maxScore = k;       // Stores the index of the maximum score
        }
    }
    average = sum / numSt;
    printf("The average score is %d\n", average);
    printf("The maximum score is %d\n", maximum);
    return maxScore;
}

void outputBest(double num[], char nameHg[][15], int hgPl, int totStu)
{
    int k;
    for (k = 0; k < totStu; k++)
    {
        if (num[k] = hgPl)
        {                       // It finds who has the highest score
            printf("%s got the highest score\n", nameHg[k]);
        }
    }
}

Answer 1

首先：scanf("%79[^/n]",fileName);应为scanf("%79[^\n]",fileName);，最好使用fgets()。

第二个拼写错误：在==条件下=拼错了if()

 if(num[k]=hgPl){ //It finds who has the highest score
 //       ^ = wrong

应该是：

 if(num[k] == hgPl){ //It finds who has the highest score

修改：

while循环错误..

fscanf(dataFile, "(%lg,%s)", &score[k], &name[k]);
//                ^   ^  ^  remove      ^

应该是：

fscanf(dataFile, "%lg%14s", &score[k], name[k]);

并在while循环中增加k。在printf("%6.1f %s\n", score[k], name[k]);之后。

用C读取文件并将数据存储在数组中

1 个答案: