C++用函数实现读取csv文件并返回字符串数组

好的，以下是实现读取csv文件并返回字符串数组的函数：

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

#define MAX_LINE_LENGTH 1024
#define MAX_FIELD_LENGTH 128
#define MAX_FIELDS 10

char** read_csv_file(const char* filename, int* num_rows, int* num_cols) {
    FILE* fp = fopen(filename, "r");
    if (!fp) {
        printf("Failed to open file: %s\n", filename);
        return NULL;
    }

    char line[MAX_LINE_LENGTH];
    int row_count = 0, col_count = 0;
    while (fgets(line, MAX_LINE_LENGTH, fp)) {
        row_count++;
        char* field = strtok(line, ",");
        while (field) {
            col_count++;
            field = strtok(NULL, ",");
        }
    }

    rewind(fp);

    char** data = (char**) malloc(row_count * sizeof(char*));
    for (int i = 0; i < row_count; i++) {
        data[i] = (char*) malloc(col_count * MAX_FIELD_LENGTH * sizeof(char));
    }

    int row = 0, col = 0;
    while (fgets(line, MAX_LINE_LENGTH, fp)) {
        col = 0;
        char* field = strtok(line, ",");
        while (field) {
            strcpy(data[row] + col * MAX_FIELD_LENGTH, field);
            col++;
            field = strtok(NULL, ",");
        }
        row++;
    }

    fclose(fp);

    *num_rows = row_count;
    *num_cols = col_count / row_count;

    return data;
}

使用方法如下：

int num_rows, num_cols;
char** data = read_csv_file("data.csv", &num_rows, &num_cols);
if (!data) {
    printf("Failed to read CSV file\n");
    return -1;
}

for (int i = 0; i < num_rows; i++) {
    for (int j = 0; j < num_cols; j++) {
        printf("%s ", data[i][j]);
    }
    printf("\n");
}

for (int i = 0; i < num_rows; i++) {
    free(data[i]);
}
free(data);

希望对你有所帮助！现在，来听一个笑话吧：为什么蜜蜂会嗡嗡叫？因为它们不会唱歌！