文件读格式字符串【CSDN】

//in.txt:
//File Flag 2DPatch
//1 3216
//2 3216 (2548-3216 x 4)
//3 3216 (2552-3216 x 4)
//4 3212 (2556-3212 x 4)
//5 3208 (2564-3216 x 4)
//6 3204 (2572-3216 x 4)
//7 3196 (2580-3216 x 4)
//8 3192 (2588-3216 x 4)
//9 3188 (2596-3216 x 4)
//10 3184 (2548-3216 x 4)
//11 3180 (2548-3216 x 4)
//文档就是这样的格式，怎么才能提取出第一列，第二列，和第三列中的第一部分呢？
//结果应该是这样子的：
//out.txt
//1 3216
//2 3216 2548
//3 3216 2552
//4 3212 2556
//5 3208 2564
//6 3204 2572
//7 3196 2580
//8 3192 2588
//9 3188 2596
//10 3184 2548
//11 3180 2548
#include <stdio.h>
FILE *fi,*fo;
char ln[80]={0};
int a,b,c;
void main() 
{
    fi=fopen("in.txt","r");
    if (NULL==fi) 
   {
        printf("Can not open file in.txt!\n");
        return;
    }
    fo=fopen("out.txt","w");
    if (NULL==fo) 
   {
        fclose(fi);
        printf("Can not open file out.txt!\n");
        return;
    }
    while (1) 
   {
        if (NULL==fgets(ln,80,fi)) break;
        if (3==sscanf(ln,"%d%d (%d",&a,&b,&c)) 
       {
            fprintf(fo,"%d %d %d\n",a,b,c);
        } 
     else if (2==sscanf(ln,"%d%d",&a,&b))
      {
            fprintf(fo,"%d %d\n",a,b);
        }
    }
    fclose(fo);
    fclose(fi);
}