中国DOS联盟

/*************************************/ #include #include #include static char Pass_w[20]; static char Chang[20]; static char new1[20]; static char new2[20]; FILE *fp; /**************************************/ void Creat() { creat ("keyword"; fclose(fp); } /****************************************/ void save() {int i; if ((fp=fopen("keyword","wb")==NULL) {printf("Cannot open file\n"; exit(0); } fwrite(Pass_w,strlen(Pass_w),1,fp); fclose(fp); } /********************************************/ void red() { if ((fp=fopen("keyword","rb")==NULL) { printf("Cannot Open File \n"; exit(0); } fscanf(fp,"%s",Pass_w); fclose(fp); } /***********************************/ void juage() { if ((fp=fopen("keyword","rb")==NULL) { creat(); loop:printf("Please Enter Your New Password:"; scanf("%s",new1); printf("\nPlease Enter Your New Password Again:"; scanf("%s",new2); while (strcmp(new1,new2)!=0) { printf ("\nYour Password is wrong!!!\nPlease Enter It Again: "; printf("\n"; goto loop; } strcpy(Pass_w,new1); save(); } } /*************************************/ void star() {int i=123; for (i=0;i<=20;i++) {Chang=getch(); if (Chang=='\r') {Chang='\0'; break;} else putch('*');} return ; } /*************************************/ void login() { printf("Please Enter Your Password: "; star(); while (strcmp(Chang,Pass_w)!=0) { printf ("\nYour Password is wrong!!!\nPlease Enter It Again: "; star(); printf("\n"; } clrscr(); printf("\t ***************Login*****Successfull*************\n\t*\t\t Loading Windows \t\t*\n\t*************************************************"; } /**************************************/ void gai() { char new1[20]; char new2[20]; printf("Please Enter Your Old Password:"; star(); printf("\n"; while (strcmp(Chang,Pass_w)!=0) { printf ("\nYour Password is wrong!!!\nPlease Enter It Again: "; star(); printf("\n"; } loop:printf("Please Enter Your New Password:"; scanf("%s",new1); printf("Please Enter Your New Password Again:"; scanf("%s",new2); while (strcmp(new1,new2)!=0) { printf ("\nYour Password is wrong!!!\nPlease Enter It Again: "; printf("\n"; goto loop; } strcpy(Pass_w,new1); creat(); save(); clrscr(); printf("\t******************Successfull********************\n\t*\t\t\t\t\t\t*\n\t*************************************************";} /************************************/ void welcome () {static char wel[1]={0}; printf("\t\tWELCOME TO BLUEEVIL'S PERSONAL COMPUTER"; loop:printf("\n\t\t[1].Login\t\t[2].Change The Password\nPlease Choose:\n\n"; wel[0]=getch(); if (wel[0]=='1') login(); else if (wel[0]=='2') {gai();goto loop;} else {printf("Please Choose [1] Or [2]\n"; goto loop;} } /**********************************************/ main() {clrscr(); printf("<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>"; printf("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"; juage(); red(); welcome(); }

作者:小草 开机密码程序，运行一次自动把程序添加到autoexec.bat文件中，下次开机就会要输入密码才能通过。 程序如下： #include "conio.h" #include "string.h" #include "stdio.h" void error() {window(12,10,68,10); textbackground(15); textcolor(132); clrscr(); cprintf("file or system error! you can't enter the system!!!"; while(1); /*若有错误不能通过程序*/ } void look() {FILE *fauto,*fbak; char *pass="c:\\windows\\password.exe"; /*本程序的位置*/ char a[25],ch; char *au="autoexec.bat",*bname="hecfback.^^^"; /*bname 是autoexec.bat 的备份*/ setdisk(2); /*set currently disk c:*/ chdir("\\"; /*set currently directory \*/ fauto=fopen(au,"r+"; if (fauto==NULL) {fauto=fopen(au,"w+"; if (fauto==NULL) error();} fread(a,23,1,fauto); /*读取autoexec.bat前23各字符*/ a[23]='\0'; if (strcmp(a,pass)==0) /*若读取的和pass指针一样就关闭文件，不然就添加*/ fclose(fauto); else {fbak=fopen(bname,"w+"; if (fbak==NULL) error(); fwrite(pass,23,1,fbak); fputc('\n',fbak); rewind(fauto); while(!feof(fauto)) {ch=fgetc(fauto); fputc(ch,fbak);} rewind(fauto); rewind(fbak); while(!feof(fbak)) {ch=fgetc(fbak); fputc(ch,fauto);} fclose(fauto); fclose(fbak); remove(bname); /*del bname file*/ } } void pass() {char *password="88888888"; char input[60]; int n; while(1) {window(1,1,80,25); textbackground(0); textcolor(15); clrscr(); n=0; window(20,12,60,12); textbackground(1); textcolor(15); clrscr(); cprintf("password:"; while(1) {input[n]=getch(); if (n>58) {putchar(7); break;} /*若字符多于58个字符就结束本次输入*/ if (input[n]==13) break; if (input[n]>=32 && input[n]0) {cprintf("\b \b"; input[n]='\0'; n--;} } input[n]='\0'; if (strcmp(password,input)==0) break; else {putchar(7); window(30,14,50,14); textbackground(15); textcolor(132); clrscr(); cprintf("password error!"; getch();} } } main() {look(); pass(); }