使用fscanf在C中逐行读取文本文件

Question

我试图让这个程序从一个文本文件中读取并逐行写入另一个文本文件。我让它读取文件并写入文件，但它只执行最后一行。我已经用谷歌搜索了好几天，并尝试了几种不同的建议方法，但这是我得到的最接近的方法。我觉得我很亲近。我还把它打印到屏幕上以帮助调试。

到目前为止，这是我的代码：

#include <stdlib.h>
#include <unistd.h>
#define MAX 20

int main()
{
    char fileInName[MAX];
    char fileOutName[MAX];
    int empNum = 0;
    char givenName[MAX];
    char surname[MAX];
    char dept[MAX];
    float ytd;
    float payRate;
    float hours;

    printf("Enter the name of the input file (Maximum of 15 characters): ");
    scanf("%s", fileInName);
    FILE *inFile = fopen(fileInName, "r");

    if(access(fileInName, F_OK) == -1)
    {
        printf("Input file does not exist! Program terminating.");

        exit(0);
    }

    printf("Enter the name of the file to hold the results (Maximum of 20 characters): ");
    scanf("%s", fileOutName);
    FILE *outFile = fopen(fileOutName, "w");

    while(fscanf(inFile, "%d\t%s\t%s\t%s\t%f\t%f\t%f\n", &empNum, givenName,
                    surname, dept, &ytd, &payRate, &hours) != EOF);
    {
            printf("%d\t%s %s\t%s\t$%.2f\t$%.2f\t%.2f\n",
                    empNum, givenName, surname, dept, ytd, payRate, hours);

            fprintf(outFile, "%d\t", empNum);
            fprintf(outFile, "%s\t", givenName);
            fprintf(outFile, "%s\t", surname);
            fprintf(outFile, "%s\t", dept);
            fprintf(outFile, "$%.2f\t", ytd);
            fprintf(outFile, "$%.2f\t", payRate);
            fprintf(outFile, "%.2f\n", hours);

    }

    fclose(inFile);
    fclose(outFile);

    return 0;
}

输入：

6  Ab-Karim   Khasby      Acct   110100.00  13.24   40.0    
10 Castillo   Jorge       Acct    66600.00  17.87   64.5    
22 Cofer      Matthew     Acct    36600.00  10.00   10.0
24 Davidson   Jacory      Acct   110090.00  41.3    36.7    
13 Foley      Zachery     Acct     1358.34  16.22   53.51
5  Gonzalez   Eduardo     DP     110090.00  10.00    1.0    
3  Gutierrez  Thomas      Mgt    673478.34     187.56   40.0    
1  Holder     David       Mgt    134234.34      67.42   56.25   
4  Johnsen    Samuel      Sales  11345.22   23.77   67.3    
12 Koirala    Akriti      Sales    234.56      17.56    38.9    
17 Lasater    William     Sales   2342.34      27.86    45.6    
7  Martin     Colton      Sales  67000.00   34.23   40.0    
86 Perkins    Felix       Inven  12345.78   13.24   40.0    
66 Reasons    Joshua      Inven 109998.75   57.87   64.5    
51 Schultz    Jesse       Inven 206600.00   10.00   10.0    
38 Stevens    Marissa     Inven  78342.00   51.3    36.75

预期输出在新文本文件中看起来几乎相同。

当前输出：

38  Stevens Marissa Inven   342.00   .30  36.75

Answer 1

行

while(fscanf(inFile, "%d\t%s\t%s\t%s\t%f\t%f\t%f\n", &empNum, givenName,
                surname, dept, &ytd, &payRate, &hours) != EOF);

由于末尾的 ; 创建了一个空循环。该循环读取所有数据，然后输出最后一组读取的数据。

你应该使用

while(fscanf(inFile, "%d\t%s\t%s\t%s\t%f\t%f\t%f\n", &empNum, givenName,
                surname, dept, &ytd, &payRate, &hours) != EOF)

使用fscanf在C中逐行读取文本文件

Reading text file line by line in C using fscanf

c

file-io