使用C++编写一个从CSV文件中读取数据的代码

Sure, I can help with that! Here is some sample C code to read data from a CSV file:

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

#define MAX_LINE_LENGTH 1024
#define MAX_NUM_FIELDS 10

int main()
{
    char filename[] = "data.csv";
    char line[MAX_LINE_LENGTH];
    char* field[MAX_NUM_FIELDS];
    int num_fields;

    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        printf("Failed to open file: %s\n", filename);
        return 1;
    }

    while (fgets(line, sizeof(line), file)) {
        num_fields = 0;
        field[num_fields] = strtok(line, ",");
        while (field[num_fields] != NULL && num_fields < MAX_NUM_FIELDS) {
            num_fields++;
            field[num_fields] = strtok(NULL, ",");
        }

        // Do something with the fields
        for (int i = 0; i < num_fields; i++) {
            printf("Field %d: %s\n", i, field[i]);
        }
    }

    fclose(file);
    return 0;
}

This code opens a CSV file named `data.csv`, reads each line of the file, and splits it into separate fields using the comma as a delimiter. The fields are then printed to the console. You can modify the code to do whatever you need with the data.

I hope this helps! Let me know if you have any other questions.