Exforsys - C and C++ http://www.exforsys.com/forum/ C and C++ en Sat, 21 Nov 2009 18:58:22 GMT vBulletin 60 http://www.exforsys.com/forum/images/misc/rss.jpg Exforsys - C and C++ http://www.exforsys.com/forum/ .multiply two 4*4 integer matrics http://www.exforsys.com/forum/c-and-c/99563-multiply-two-4-4-a.html Thu, 19 Nov 2009 14:35:29 GMT . can any one help me to do... . can any one help me to do this
multiply two 4*4 integer matrics
.swap two numbers without using a third variable
.read details of 10 students(name,roll no:,score)
sort the student record with score ,and print it ]]> C and C++ reshmajohney http://www.exforsys.com/forum/c-and-c/99563-multiply-two-4-4-a.html Print Prime numbers http://www.exforsys.com/forum/c-and-c/99538-print-prime-numbers.html Sun, 08 Nov 2009 17:54:20 GMT HI, Want help in writing a... HI,
Want help in writing a program in C. :Print first 25 prime numbers. ]]> C and C++ reshum http://www.exforsys.com/forum/c-and-c/99538-print-prime-numbers.html can i have a logic to calculate employee H R http://www.exforsys.com/forum/c-and-c/99500-can-i-have-logic.html Thu, 22 Oct 2009 19:10:30 GMT i a beginer of c language,... i a beginer of c language, and can i have a logic how to find a H R and all the complete calculation of an employee using structures concept..... ]]> C and C++ imranu99 http://www.exforsys.com/forum/c-and-c/99500-can-i-have-logic.html how to make the password in to asterisk and asign a exact password for char. http://www.exforsys.com/forum/c-and-c/99485-how-make-password-asterisk.html Mon, 12 Oct 2009 11:15:08 GMT uhm.... excuse me but can you... uhm.... excuse me but can you please help me? i'm having trouble with making password in TURBO c.... the condition goes like this, while the user is entering a password, the user will not see alpha-numeric characters instead, he/ she can see only asterisk... and the computer will read the password.
if the password is 'liza' it will clear the screen and it will loading...if it`s not it will print 'failed to log-in'
can you please tell me the code?????


my only problem is how to asign password and the computer or the program will read the password

here`s my code:


Code:
#include<conio.h>
#include<stdio.h>
main()
{

char *ptr;
char pwd[150];
char c;
int a,x;
int i=0;
char password[15];

      clrscr();

      printf("ENTER PASsword");


while(1)
{

  gets(password);
  x=strcmp(password, "liza");
  c=getch();
if(c==13)
{

pwd[i]=NULL;
break;
}

printf("*");
pwd[i++] = c;
}
  if(x!=0)
  {
          printf("FAILED TO LOG-IN");
        }

    clrscr();

      for(a=1;a<=80;a++)
    {
    gotoxy(a,1);printf("\xDB");
    gotoxy(a,24);printf("\xDB");
    delay(990);
    gotoxy(37,13);printf("LOADING!!!");
    }

getch();
}
kindly help me..thnx in advance ]]> C and C++ liza12 http://www.exforsys.com/forum/c-and-c/99485-how-make-password-asterisk.html Struct as an array of pointers to struct http://www.exforsys.com/forum/c-and-c/99468-struct-array-pointers-struct.html Tue, 29 Sep 2009 22:06:23 GMT Here it goes. I have a... Here it goes.
I have a little problem when trying to use the struct proyecto_t,
The code 1 below is a copy of my structures file.
Then there's a copy of one of the procedures that is working fine with a proyecto_t variable. That's code 2.
But when I try to access a element pointed by PRO->actividades[i]->dur, that is a unsigned int with scanf(), my program crashes... I did try to use the address of (&) operator and also tried using it twice but nothing happens it is still crashing at runtime.
Code 3 is the copy of the procedures that fails.

1. I tried to use array notation.
2. Also using the pointer arithmetic, but it is still crashing

Thanks a lot, meanwhile I'll be trying to help someone else xD:icon13:

1.---------CODE---------------

Code:
#ifndef _ST_ACTIVIDAD_
#define _ST_ACTIVIDAD_
struct actividad
{
        char name[15];
        unsigned int dur;
};
typedef struct actividad actividad_t;
#endif

#ifndef _ST_PROYECTO_
#define _ST_PROYECTO_
struct proyecto
{
        unsigned int n;
        actividad_t *actividades; // here it is, this is the one that's not working
};
typedef struct proyecto proyecto_t;
#endif

#ifndef _ST_RELACION_
#define _ST_RELACION_
struct relacion
{
        short **relaciones; // THIS WORKS FINE AS A MATRIX
};
typedef struct relacion relacion_t;
#endif

2.------CODE------------
Code:
#ifndef P_INI_ST
#define P_INI_ST
void ini(proyecto_t *PRO, relacion_t *REL)
{
       

        unsigned int
        i;
        PRO->actividades = (actividad_t*) malloc(sizeof(actividad_t)*(PRO->n));// No warnings from the compiler here.
        REL->relaciones= (short**) malloc(sizeof(short*)*PRO->n);
       
        for(i=0;i<PRO->n;i++)
        {
                REL->relaciones[i]= (short*) malloc(sizeof(short)*PRO->n);
        }
       
}
#endif
3.-------CODE-------
Code:
#ifndef P_LEER_PROYECTO_ST
#define        P_LEER_PROYECTO_ST
void leer_proyecto(proyecto_t *PRO, relacion_t *REL)
{
        unsigned int
        i;
        for(i=0;i<PRO->n;i++)
        {
                printf("Ingrese actividad: ");
                scanf("%[^\n]s",&(PRO->actividades[i]->name));
                printf("Ingrese duracion: ");
                scanf("%u",&(PRO->actividades[i]->dur)); // When here it crashes
        }
       
}
#endif
]]> C and C++ galileopy http://www.exforsys.com/forum/c-and-c/99468-struct-array-pointers-struct.html Struct as an array of pointers to struct http://www.exforsys.com/forum/c-and-c/99467-struct-array-pointers-struct.html Tue, 29 Sep 2009 21:56:21 GMT Here it goes. I have a... Here it goes.
I have a little problem when trying to use the struct proyecto_t,
The code 1 below is a copy of my structures file.
Then there's a copy of one of the procedures that is working fine with a proyecto_t variable. That's code 2.
But when I try to access a element pointed by PRO->actividades[i]->dur, that is a unsigned int with scanf(), my program crashes... I did try to use the address of (&) operator and also tried using it twice but nothing happens it is still crashing at runtime.
Code 3 is the copy of the procedures that fails.

1.---------CODE---------------

Code:
#ifndef _ST_ACTIVIDAD_
#define _ST_ACTIVIDAD_
struct actividad
{
        char name[15];
        unsigned int dur;
};
typedef struct actividad actividad_t;
#endif

#ifndef _ST_PROYECTO_
#define _ST_PROYECTO_
struct proyecto
{
        unsigned int n;
        actividad_t *actividades; :icon14::icon14:
};
typedef struct proyecto proyecto_t;
#endif

#ifndef _ST_RELACION_
#define _ST_RELACION_
struct relacion
{
        short **relaciones; // THIS WORKS FINE AS A MATRIX
};
typedef struct relacion relacion_t;
#endif

2.------CODE------------
Code:
#ifndef P_INI_ST
#define P_INI_ST
void ini(proyecto_t *PRO, relacion_t *REL)
{
       

        unsigned int
        i;
        PRO->actividades = (actividad_t*) malloc(sizeof(actividad_t)*(PRO->n));:icon14::icon14:
        REL->relaciones= (short**) malloc(sizeof(short*)*PRO->n);
       
        for(i=0;i<PRO->n;i++)
        {
                REL->relaciones[i]= (short*) malloc(sizeof(short)*PRO->n);
        }
       
}
#endif
3.-------CODE-------
Code:
#ifndef P_LEER_PROYECTO_ST
#define        P_LEER_PROYECTO_ST
void leer_proyecto(proyecto_t *PRO, relacion_t *REL)
{
        unsigned int
        i;
        for(i=0;i<PRO->n;i++)
        {
                printf("Ingrese actividad: ");
                scanf("%[^\n]s",&(PRO->actividades[i]->name));
                printf("Ingrese duracion: ");
                scanf("%u",&(PRO->actividades[i]->dur));:icon14::icon14:
        }
       
}
#endif
]]> C and C++ galileopy http://www.exforsys.com/forum/c-and-c/99467-struct-array-pointers-struct.html