linux/windows 雙平台csv文件生成方法

逗號分隔值（Comma-Separated Values，CSV，有時也稱為字符分隔值，因為分隔字符也可以不是逗號），其文件以純文本形式存儲表格數據（數字和文本）。

1、linux/windows 可移植

#include <stdio.h>

int main()
{
    FILE *fp;
    char const *fileTitle = "num,test content,result\n";
    char const *log_body = ",test_";
    char const *seprate = ",";
    char const *log_tail = "\n";
    char log[64] = {0};

    fp = fopen("./csvtest.csv","wb");
    fprintf(fp,fileTitle);

    for(int i = 0; i < 10; i++)
    {
        if(i%2 == 0)
            sprintf(log,"%d%s%d%s%d%s",i,log_body,i,seprate,0,log_tail);
        else
            sprintf(log,"%d%s%d%s%d%s",i,log_body,i,seprate,1,log_tail);
        fprintf(fp,log);
    }


    fclose(fp);
}

2、linux 下也可以直接使用system()

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

int main()
{
    char log[64] = {0};
    char const *log_head = "echo ";
    char const *log_body = ",test_";
    char const *seprate = ",";
    char const *log_tail = " >> ./csvtest1.csv";
    system("echo num,test content,result >> ./csvtest1.csv");
    for(int i = 0; i < 10; i++)
    {
        if(i%2 == 0)
            sprintf(log,"%s%d%s%d%s%d%s",log_head,i,log_body,i,seprate,0,log_tail);
        else
            sprintf(log,"%s%d%s%d%s%d%s",log_head,i,log_body,i,seprate,1,log_tail);
        system(log);
    }
}