в 14:20, 25 мая 2010

2010-05-25T14:20:56Z

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2010-05-25T10:22:53Z

1 версия: Импорт контента...

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==Assign value to a char pointer==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
char *p;
p = "one two three";
printf(p);
return 0;
}

</source>

==Assign value to char pointer ==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
char *p, *q;
printf("Enter a string: ");
p = gets(q);
printf(p);
return 0;
}

</source>

==Char"s pointer"s pointer==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
char *p, **mp, str[80];
p = str;
mp = &p;
printf("Enter your name: ");
gets( *mp );
printf("Hi %s", *mp);
return 0;
}

</source>

==Get string and assign its value to a char pointer==

<source lang="cpp">

int main(void)
{
char *p;
printf("Enter a string: ");
gets(p);
return 0;
}

</source>

==Our own string copy function based on pointer==

<source lang="cpp">

#include <stdio.h>
void mycpy(char *to, char *from);
int main(void)
{
char str[80];
mycpy(str, "this is a test");
printf(str);
return 0;
}
void mycpy(char *to, char *from)
{
while(*from)
*to++ = *from++;

*to = "\0"; /* null terminates the string */
}

</source>

==Pointer for char, int, float and double==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
char *cp, ch;
int *ip, i;
float *fp, f;
double *dp, d;
cp = &ch;
ip = &i;
fp = &f;
dp = &d;
/* print the current values */
printf("%p %p %p %p\n", cp, ip, fp, dp);
/* now increment them by one */
cp++;
ip++;
fp++;
dp++;
/* print their new values */
printf("%p %p %p %p\n", cp, ip, fp, dp);
return 0;
}

</source>

==Read and output: Address pointed by the argument==

<source lang="cpp">
#include <stdio.h>
int main(void)
{
char *p;
printf("Enter an address: ");
scanf("%p", &p);
printf("Value at location %p is %c\n", p, *p);
return 0;
}

</source>

==using normal array subscripting==

<source lang="cpp">
#include <stdio.h>
#define ISIZE 10
int main( )
{
char string10[ISIZE];
int i;
for(i = 0; i < ISIZE; i++)
string10[i]=getchar( );
for(i = ISIZE-1; i >= 0; i--)
putchar(string10[i]);
}

</source>

==using pointer arithmetic to access elements==

<source lang="cpp">
#include <stdio.h>
#define ISIZE 10
int main( )
{
char string10[ISIZE];
char *pc;
int icount;
pc=string10;
for(icount = 0; icount < ISIZE; icount++) {
*pc=getchar( );
pc++;
}
pc=string10 + (ISIZE - 1);
for(icount = 0; icount < ISIZE; icount++) {
putchar(*pc);
pc--;
}
}

</source>

==using the strcpy function==

<source lang="cpp">
#include <iostream>
#include <string>
using namespace std;
#define iSIZE 20
main( )
{
char s[iSIZE]="Initialized String!",d[iSIZE];
strcpy(d,"String Constant");
cout << "\n" << d;
strcpy(d,s);
cout << "\n" << d;
return(0);
}

</source>

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C/Pointer/Pointer Char - История изменений

в 14:20, 25 мая 2010

Admin: 1 версия: Импорт контента...