C语言 在输入文件中查找最大行长和最大行数，但我遇到 seg 错误

Question

我正在尝试将文件输入二维数组，但是在尝试查找最大行长度和最大行数时遇到seg错误。seg 错误发生在函数检查拼写中。我尝试使用 gdb 查看 seg 错误发生的位置，但我发现它立即退出，但我并不完全理解。 我的代码如下。任何帮助将不胜感激。

#define MAX 1000000
struct TData{
    char **pChar;
};
int checkSpelling(const char *input, const char *dict, struct TData *pInput, struct TData *pDictionary);
int searchReplace(const char *input, const char *dict, struct TData *pInput, struct TData *pDictionary);
int save(const char *input, const char *output);
int main (int argc, char **argv){
    struct TData input, dictionary, output;
    int choice = 0;
    if(argc != 4){
            printf("Not enough input arguments in the command line.n");
            exit(1);
    }
    do{
            printf("Menun");
            printf("1. Check the spelling for the file using the dictionary.n");
            printf("2. Search and replace a given string in the inputed file.n");
            printf("3. Save the modified file to the output file.n");
            printf("4. Exit the program.n");
            scanf("%d", &choice);
            switch(choice){
                    case 1:
                            checkSpelling(argv[1], argv[3], &input, &dictionary);
                            break;
                    case 2:
                            searchReplace(argv[1], argv[3], &input, &dictionary);
                            break;
                    case 3:
                            save(argv[1],argv[2]);
                            break;
                    case 4:
                            choice = 4;
                            break;
                    default:
                            printf("Input is invalid");
                            break;
            }
    }while (choice != 4);
return 0;
}
int checkSpelling(const char *input, const char *dicto, struct TData *pInput, struct TData *pDictionary){
    FILE *inputFile;
    FILE *dictFile;
    int i = 0, j = 0, k = 0, l = 0, m = 0;
    char temp[60], dicttemp[60];
    int rowCount = 0, charCount = 0;
    printf("Checking the spelling of the inputed file.n");
    printf("Opening the inputed file...n");
    if((inputFile = fopen(input, "rt")) == NULL){
            printf("Cannot open filen");
            exit(1);
    }
    printf("Opening the dictonary...n");
    if((dictFile = fopen(dicto, "rt")) == NULL){
            printf("Cannot open dictionaryn");
            exit(1);
    }
    while(!feof(inputFile)){
            if(pInput->pChar[i][j] == 'n'){
                    rowCount++;
            }
    }
    rewind(inputFile);
    pInput->pChar[i][j] = 0;
    while(pInput->pChar[i][j] != 'n'){
            charCount++;
    }
    rewind(inputFile);
    printf("Lines: %d, Max line length: %d", rowCount, charCount);
    fclose(inputFile);
    fclose(dictFile);
    printf("n");
return 0;
}

Answer 1

这是一个小代码，可以举例说明任务

#include <stdio.h>
#include <string.h>
#define MAX_LENGTH 1000
int main()
{
    FILE *fp;
    char line[MAX_LENGTH];
    size_t n_rows, n_cols, length;
    fp = fopen("myfile.txt", "r");
    n_cols = 0;
    n_rows = 0;
    while (fgets(line, MAX_LENGTH, fp) != NULL) {
        n_rows++;
        length = strlen(line);
        if (length > n_cols)
            n_cols = length;
    }
    fclose(fp);
    /* the number of lines is in n_rows and the max line length is in n_cols
    do whatever you want with them */
    return 0;
}