1. #include <stdio.h>
    2. /**
    3.   * @brief  文件操作，将参数写入到文件中
    4.   * @param  write data_1 data_2 data_3
    5.   * @param  filename file's path and name
    6.   * @retval None
    7.   */
    8. void WriteIn_Params(double data_1,double data_2,double data_3,char* filename)
    9. {
    10.     //file point
    11.     FILE *fp;
    13.     //get file operate error handle
    14.     int nResult;
    15.     fp = fopen(filename, "a+");   //新建文本文件并追加数据
    16.     if (NULL == fp)
    17.     {
    18.         printf("Open file error\n");
    19.     }
    21.     //write in
    22.     nResult = fprintf(fp, "%f %f %f\n", data_1,data_2,data_3);
    24.     //Write data failed
    25.     if (nResult < 0)
    26.     {
    27.         printf("Write data to file error\n");
    28.     }
    29.     printf("Write formatted data to file completely\n");
    31.     //close the file and delet the point 
    32.     fclose(fp);
    33. }