如何将float修改为char并将其作为参数传递？

Question

我想将float更改为char并将其传递给函数作为参数以保存在文件中。 数据未保存在文件中。

如代码中所示，我尝试将数据从float转换为char，然后获取此数据并将其放入文件中。然后关闭此文件。

void file_create (char data[DATA_SIZE]) {

    FILE *fptr; 



    fptr = fopen("D:\\backup01\\Downloads\\Prog\\userdata.txt", "w");

    if (fptr==NULL) { 
        printf("file could not be created or open \n\n"); 
        exit (EXIT_FAILURE); 
    }
    else {    
        fprintf(data, "%f", mat); /*convert "mat" to char and "mat" is a float 2d array declared as global variable and its data is collected from an other function*/    
        gets(data); 
        fputs(data, fptr);
        fclose(fptr);
        printf("Your data has been saved in the file correctly\n\n");
    }
}

无错误消息。文件已创建但没有数据。