仅供参考：
//输出PROG中有但LIST中没有的文本行，即集合PROG-LIST
#include
#include
#include
#include
#define MAXCHARS 512
int MAXLINES=10000,MAXLINES2;
char *buf,*buf2;
char PROG[256]="PROG";//程序Program需要的文件列表
char LIST[256]="LIST";//dir /b /s生成的实际文件列表List
FILE *fp,*fl;
int i,c,n,L,hh;
int ignore_case=0;
char ln[MAXCHARS];
int icompare(const void *arg1,const void *arg2) {
return stricmp((char *)arg1,(char *)arg2);
}
int compare(const void *arg1,const void *arg2) {
return strcmp((char *)arg1,(char *)arg2);
}
int main(int argc,char **argv) {
if (argc>1) strcpy(PROG,argv[1]);//命令行参数1覆盖PROG
if (argc>2) strcpy(LIST,argv[2]);//命令行参数2覆盖LIST
if (argc>3) ignore_case=1;//若存在命令行参数3，忽略大小写
if ((fl=fopen(LIST,"rt"))==NULL) {
fprintf(stderr,"Can not open %s\n",LIST);
fprintf(stderr,"Usage: %s [PROG] [LIST] [-i]\n",argv[0]);
return 1;
}
if ((fp=fopen(PROG,"rt"))==NULL) {
fclose(fl);
fprintf(stderr,"Can not open %s\n",PROG);
fprintf(stderr,"Usage: %s [PROG] [LIST] [-i]\n",argv[0]);
return 2;
}
buf=(char *)malloc(MAXLINES*MAXCHARS);
if (NULL==buf) {
fclose(fl);
fclose(fp);
fprintf(stderr,"Can not malloc(%d LINES*%d CHARS)!\n",MAXLINES,MAXCHARS);
return 4;
}
n=0;
hh=0;
i=0;
while (1) {
if (fgets(ln,MAXCHARS,fl)==NULL) break;//
hh++;
L=strlen(ln)-1;
if ('\n'!=ln[L]) {//超长行忽略后面内容
fprintf(stderr,"%s Line %d too long(>%d),spilth ignored.\n",LIST,hh,MAXCHARS);
while (1) {
c=fgetc(fl);
if ('\n'==c || EOF==c) break;//
}
}
while (1) {//去掉行尾的'\n'和空格
if ('\n'==ln[L] || ' '==ln[L]) {
ln[L]=0;
L--;
if (L<0) break;//
} else break;//
}
if (L>=0) {
strcpy(buf+i,ln);i+=MAXCHARS;
n++;
if (n>=MAXLINES) {
MAXLINES2=MAXLINES*2;
if (MAXLINES2==1280000) MAXLINES2=2500000;
buf2=(char *)realloc(buf,MAXLINES2*MAXCHARS);
if (NULL==buf2) {
free(buf);
fclose(fl);
fclose(fp);
fprintf(stderr,"Can not malloc(%d LINES*%d CHARS)!\n",MAXLINES2,MAXCHARS);
return 5;
}
buf=buf2;
MAXLINES=MAXLINES2;
}
}
}
fclose(fl);
if (ignore_case) qsort(buf,n,MAXCHARS,icompare);
else qsort(buf,n,MAXCHARS,compare);
hh=0;
while (1) {
if (fgets(ln,MAXCHARS,fp)==NULL) break;//
hh++;
L=strlen(ln)-1;
if ('\n'!=ln[L]) {//超长行忽略后面内容
fprintf(stderr,"%s Line %d too long(>%d),spilth ignored.\n",PROG,hh,MAXCHARS);
while (1) {
c=fgetc(fp);
if ('\n'==c || EOF==c) break;//
}
}
while (1) {//去掉行尾的'\n'和空格
if ('\n'==ln[L] || ' '==ln[L]) {
ln[L]=0;
L--;
if (L<0) break;//
} else break;//
}
if (L>=0) {
if (ignore_case) {
if (NULL==bsearch(ln,buf,n,MAXCHARS,icompare)) printf("%s\n",ln);
} else {
if (NULL==bsearch(ln,buf,n,MAXCHARS,compare)) printf("%s\n",ln);
}
}
}
fclose(fp);
free(buf);
return 0;
}
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