Ideen
Schneiden
Lesen Sie die Datei, schneiden Sie sie entsprechend der Eingabegröße ab, fangen Sie den Dateinamen als Namen der ausgeschnittenen Datei ab und speichern Sie die Namen der ausgeschnittenen Dateien in ./data/filelist.txt
verschmelzen
Lesen Sie die Namen der geteilten Dateien in ./data/filelist.txt, lesen Sie die Dateien in einer Schleife und schreiben Sie sie in neue Dateien.
Flussdiagramm
der Code
Speisekarte
void DispalyMenu(){
printf("==============请选择功能==============\n");
printf("= 1.切割 =\n");
printf("= 2.合并 =\n");
printf("= 3.退出 =\n");
printf("======================================\n");
return;
}
Hauptfunktion
int main(int argc,char* argv[])
{
char option;
DispalyMenu();
scanf("%c",&option);
while(1){
switch(option){
case '1': FileCutting();break;
case '2': FileMerge();break;
case '3': exit(0);
default: exit(0);
}
DispalyMenu();
getchar();
scanf("%c",&option);
}
return 0;
}
Saitenschneiden
Übergeben Sie die Zeichen, schließen Sie mit „.“ als Bedingung ab und geben Sie schließlich nur den Dateinamen zurück.
char * NameSqlit(char *filename){
char *name;
int n = strlen(filename);
int i = 0;
name = (char *)malloc(n-4);
while(*(filename+i) != '.'){
*(name+i) = *(filename+i);
i++;
}
*(name+i) = '\0';
return name;
}
Feilenschneiden
int FileCutting(){
FILE *fpr; /*读文件指针*/
FILE *fpw; /*写文件指针*/
FILE *fplist; /**/
char file_name[20];
int file_id; /*新文件名id，001,002*/
int n = 0;
long offset; /*文件指针位置*/
long fsize; /*文件大小*/
long fblock = 0; /* 1 M */
char data;
unsigned int size_r;
printf("请输入文件名\n");
scanf("%s",file_name);
printf("请输入切割大小(输入50则拆分50K一份)\n");
scanf("%d",&n);
//printf("%s",NameSqlit(file_name));
if(NameSqlit(file_name) == "" || n == 0){
printf("输入有误，程序退出\n");
return 0;
}
fblock = 1024 * n;
fpr = fopen(file_name,"rb");
if(!fpr)
{
printf("文件打开失败！\n");
return 0;
}
offset = 0;
fseek(fpr,0,SEEK_END);
fsize = ftell(fpr);
fseek(fpr,0,SEEK_SET); /*返回文件头*/
size_r = fread(&data,sizeof(char),1,fpr);
file_id = 1;
sprintf(file_name,"%s.%03d",NameSqlit(file_name),file_id); /* demo.001 */
fpw = fopen(file_name,"wb"); /*创建新文件*/
fplist = fopen("./data/filelist.txt","w");
while(size_r>0)
{
/*写入新的文件*/
fwrite(&data,sizeof(char),1,fpw);
offset = ftell(fpr);
if(offset % fblock == 0)
{
/*结束当前文件，建立新文件*/
fclose(fpw);
fputs(file_name,fplist);
fputs("\n",fplist);
file_id++;
sprintf(file_name,"%s.%03d",NameSqlit(file_name),file_id); /* demo.00x */
fpw = fopen(file_name,"wb"); /*创建新文件*/
}
size_r = fread(&data,sizeof(char),1,fpr);
}
if(fpw)
{
fputs(file_name,fplist);
fputs("\n",fplist);
fclose(fpw);
}
fclose(fplist);
fclose(fpr);
printf("文件切割完成\n");
return 0;
}
Dateizusammenführung
int FileMerge(){
FILE *fpr;
FILE *fpw;
FILE *fplist;
char file_name[20],filename[20];
int file_id,i;
char data;
unsigned int size_r;
char name[20];
printf("请输入要合成的文件(格式ceshi.txt):\n");
scanf("%s",filename);
/*创建要写人文件*/
fpw = fopen(filename,"wb");
if(!fpw)
{
printf("文件创建失败！\n");
return 0;
}
fplist = fopen("./data/filelist.txt","r");
//fgets(file_name,20,fplist);
while(fgets(file_name,20,fplist) != NULL)
{
file_name[strlen(file_name)-1]='\0';
fpr = fopen(file_name,"rb");
if(!fpr)
{
printf("打开文件%s失败\n",file_name);
return 0;
}
size_r = fread(&data,sizeof(char),1,fpr);
while(size_r>0)
{
fwrite(&data,sizeof(char),1,fpw);
size_r = fread(&data,sizeof(char),1,fpr);
}
fclose(fpr);
//fgets(file_name,20,fplist);
}
fclose(fpw);
printf("文件合并完成\n");
return 0;
}
Befehlsparameterversion verwenden
int FileCutting(char *file_name,long n){
FILE *fpr; /*读文件指针*/
FILE *fpw; /*写文件指针*/
FILE *fplist; /**/
//char file_name[20];
int file_id; /*新文件名id，001,002*/
long offset; /*文件指针位置*/
long fsize; /*文件大小*/
long fblock = 0; /* 1 M */
char data;
unsigned int size_r;
//printf("请输入文件名\n");
//scanf("%s",file_name);
//printf("请输入切割大小(输入50则拆分50K一份)\n");
//scanf("%d",&n);
//printf("%s",NameSqlit(file_name));
if(NameSqlit(file_name) == 0 || n == 0){
printf("输入有误，程序退出\n");
return 0;
}
fblock = 1024 * n;
fpr = fopen(file_name,"rb");
if(!fpr)
{
printf("文件打开失败！\n");
return 0;
}
offset = 0;
fseek(fpr,0,SEEK_END);
fsize = ftell(fpr);
fseek(fpr,0,SEEK_SET); /*返回文件头*/
size_r = fread(&data,sizeof(char),1,fpr);
file_id = 1;
sprintf(file_name,"%s.%03d",NameSqlit(file_name),file_id); /* demo.001 */
fpw = fopen(file_name,"wb"); /*创建新文件*/
fplist = fopen("./data/filelist.txt","w");
while(size_r>0)
{
/*写入新的文件*/
fwrite(&data,sizeof(char),1,fpw);
offset = ftell(fpr);
if(offset % fblock == 0)
{
/*结束当前文件，建立新文件*/
fclose(fpw);
fputs(file_name,fplist);
fputs("\n",fplist);
file_id++;
sprintf(file_name,"%s.%03d",NameSqlit(file_name),file_id); /* demo.00x */
fpw = fopen(file_name,"wb"); /*创建新文件*/
}
size_r = fread(&data,sizeof(char),1,fpr);
}
if(fpw)
{
fputs(file_name,fplist);
fputs("\n",fplist);
fclose(fpw);
}
fclose(fplist);
fclose(fpr);
printf("文件切割完成\n");
return 0;
}
int FileMerge(char *filename){
FILE *fpr;
FILE *fpw;
FILE *fplist;
char file_name[20];
//char filename[20];
int file_id,i;
char data;
unsigned int size_r;
char name[20];
fpw = fopen(filename,"wb");
if(!fpw)
{
printf("文件创建失败！\n");
return 0;
}
fplist = fopen("./data/filelist.txt","r");
while(fgets(file_name,20,fplist) != NULL)
{
file_name[strlen(file_name)-1]='\0';
fpr = fopen(file_name,"rb");
if(!fpr)
{
printf("打开文件%s失败\n",file_name);
return 0;
}
size_r = fread(&data,sizeof(char),1,fpr);
while(size_r>0)
{
fwrite(&data,sizeof(char),1,fpw);
size_r = fread(&data,sizeof(char),1,fpr);
}
fclose(fpr);
}
fclose(fpw);
printf("文件合并完成\n");
return 0;
}
void DispalyMenu(){
printf("请输入正确的命令格式如下：\n");
printf("main.exe -t s 分割文件 单个文件大小\n");
printf("main.exe -t m 合并后的文件名称\n");
return;
}
int main(int argc,char* argv[])
{
if(strcmp("s",argv[2]) == 0){
if(argc < 5){
DispalyMenu();
return 0;
}
printf("正在切割文件请稍后...\n");
FileCutting(argv[3],strtol(argv[4],NULL,10));
}else if(strcmp("m",argv[2]) == 0){
if(argc < 4){
DispalyMenu();
return 0;
}
printf("正在合并文件请稍后...\n");
FileMerge(argv[3]);
}else{
DispalyMenu();
return 0;
}
}
Darstellungen
