c - 从不兼容的指针类型传递 ‘search_and_count’ 的参数 2 [默认启用]

Question

我遇到了一堆指针错误，而且指针并不是我的强项。我的大部分错误都与传递参数有关。

错误是:

HW5_mkhan44.c: In function ‘main’: HW5_mkhan44.c:31:3: warning: passing argument 1 of ‘search_and_count’ from incompatible pointer type [enabled by default]

HW5_mkhan44.c:11:6: note: expected ‘struct FILE *’ but argument is of type ‘struct FILE **’

HW5_mkhan44.c:31:3: warning: passing argument 2 of ‘search_and_count’ from incompatible pointer type [enabled by default]

HW5_mkhan44.c:11:6: note: expected ‘const char *’ but argument is of type ‘char * (*)[100]’

HW5_mkhan44.c:31:3: warning: passing argument 3 of ‘search_and_count’ from incompatible pointer type [enabled by default]

HW5_mkhan44.c:11:6: note: expected ‘int *’ but argument is of type ‘int **’

HW5_mkhan44.c:31:3: warning: passing argument 4 of ‘search_and_count’ from incompatible pointer type [enabled by default]

HW5_mkhan44.c:11:6: note: expected ‘int *’ but argument is of type ‘int **’

这是代码:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int word_search(const char *word, const char *str);
int character_count(const char *curr_str);
void search_and_count(FILE *fpter, const char *c, int *len, int *result);

int main(void)
{
        FILE *fileptr;
        char filename[100];
        char* word[100];
        int *length;
        int *num;

        printf("Please input the text file name: ");
        scanf("%s", filename);

        fileptr = fopen(filename, "r");

        if(fileptr == NULL)
                printf("File does not exist\n");
        else{
                printf("Please enter a word to search: ");
                scanf("%s", word);
                search_and_count(&fileptr, &word, &length, &num);

                if(*num == 0){
                        printf("Word exists in file");
                        printf("There are %d characters in file", *length);
                }
                else
                        printf("Word does not exist in file");
        }
        fclose(fileptr);

        return 0;
}

int word_search(const char *word,const char *str)
{
        int num;
   if(strcmp(word, str) == 0){
                num = 0;
                return(num);
        }
        else{
                num = 1;
                return(num);
        }
}

int character_count(const char *current_str)
{
        int word_length;

        word_length = strlen(current_str);

        return(word_length);
}

void search_and_count(FILE *fpter, const char *c, int *len, int *result)
{
        char line[120];

        while(fgets(line, sizeof(line), fpter)){
                char* t = strtok(line, " ");
                *len = word_search(c, t);
                *result = character_count(t);
        }
}

Answer 1

这看起来像是语法错误:

• 在 search_and_count(&fileptr, &word, &length, &num);你已经将它们声明为指针，所以删除所有 & s 如果你想发送指针
• char* []声明应该只是 char []因为它可以被视为指针

然后遍历每个语句，看看是否有任何逻辑错误，祝你好运!