程序代码：

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
int main(void)
{
    FILE *fp = NULL;
    char buf[3000] = { 0 };
    int count = 0;
    int row = 0;
    int ch = 0;
    fp = fopen("G:\\outil1.par", "r");
    if (fp == NULL)
    {
        printf("Cann't open the file!\n");
        exit(1);
    }
    else
    {
//----------------------------------------------------------------------------
        while (1)
        {
            printf("Input a row you want to read: \n");
            scanf("%d", &row);
            fflush(stdin);
            while (!feof(fp))
            {
                fgets(buf, 3000, fp);
                count++;
                if (row == count)        
                {
                    printf("%s", buf);
                }
                memset(buf, 0, sizeof(buf));
            }
            count = 0;
            rewind(fp);
            printf("go on? [y/n]: ");
            scanf("%c", &ch);
            fflush(stdin);
//----------------------------------------------------------------
            if (ch == 'y' || ch == 'Y')
            {
                continue;
            }
            else
            {
                break;
            }
        }
        fclose(fp);
    }
    system("pause");
    return 0;
}