FILE *fp1_u;                     
    errno_t err1_u;
    err1_u = fopen_s(&fp1_u, "C:\\Users\owner chen\Documents\EX\t1_u.txt", "w");
    fprintf(fp1_u, "时间步长：0.1\n");
    fprintf(fp1_u, "迭代步数");
    for (int i = 0; i < 10; i++)
        fprintf(fp1_u, "%d           ", i);
    fprintf(fp1_u, "\n");
    fprintf(fp1_u, "u的数值解");
    for (int i = 0; i < 10; i++)
        fprintf(fp1_u, "%f           ", u[0][i]);         
    fprintf(fp1_u, "\n");
    fprintf(fp1_u, "u的精确解（sin（ft））");
    for (int i = 0; i < 10; i++)
        fprintf(fp1_u, "%f           ", u0[0][i]);
    fprintf(fp1_u, "\n");
    fprintf(fp1_u, "误差");
    for (int i = 0; i < 10; i++)
        fprintf(fp1_u, "%f           ", r_u[0][i]);
    fprintf(fp1_u, "\n");
    fprintf(fp1_u, "误差比");
    for (int i = 0; i < 10; i++)
        fprintf(fp1_u, "%f          ", err_u[0][i] * 100);
    fprintf(fp1_u, "\n");
    fprintf(fp1_u, "累积误差");
    for (int i = 0; i < 10; i++)
        r = r + r_u[0][i];
    fprintf(fp1_u, "%f           ", r);
    fprintf(fp1_u, "\n");

程序如上，运行到fprintf语句时，会出现：将一个无效参数传递给了将无效参数视为严重错误的函数 的错误。因为使用vs编的只能用fopen_s，请教各位我该如何把文件指针正确指向目标文件，已达到导出的目的。