合并两个已经按递增排序的文件

合并两个已经按递增排序的文件
#include 
#include 
#define SIZE 1024
int main(int argc,char **argv)
{
    if(argc != 4)
    {
        printf("Please try Use --help\n");
        return -1;
    }
    
    FILE *fp1,*fp2,*fp3;
    int t1,t2;

    if((fp1 = fopen(argv[1],"r")) == NULL)
    {
        perror("open error");
        return -1;
    }
    
    if((fp2 = fopen(argv[2],"r")) == NULL)
    {
        perror("open error");
        return -1;
    }
    
    if((fp3 = fopen(argv[3],"w")) == NULL)
    {
        perror("open error");
        return -1;
    }
    fread(&t1,sizeof(int),1,fp1);
    fread(&t2,sizeof(int),1,fp2);
    //printf("%d%d\n",t1,t2);
    /*两个文件都未读取完*/
    while((!feof(fp1))&&(!feof(fp2)))
    {
        if(t1 < t2)
        {
            fwrite(&t1,sizeof(int),1,fp3);
            fread(&t1,sizeof(int),1,fp1);
        }
        else
        {
            fwrite(&t2,sizeof(int),1,fp3);
            fread(&t2,sizeof(int),1,fp2);
        }
    }
    /*文件2读取完成*/
    while(!feof(fp1))
    {
        fwrite(&t1,sizeof(int),1,fp3);
        fread(&t1,sizeof(int),1,fp1);
    }
    /*文件1读取完*/
    while(!feof(fp2))
    {
    	fwrite(&t2,sizeof(int),1,fp3);
        fread(&t2,sizeof(int),1,fp2);
    }

    /*不要忘记关闭文件指针*/
    fclose(fp1);
    fclose(fp2);
    fclose(fp3);
    return 0;
}