| Цитата |
1) Как преобразовать Строку в double , в int и обратно?
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| Цитата |
Convert a string to double (atof and _wtof), integer (atoi, _atoi64, _wtoi and _wtoi64), or long integer (atol and _wtol).
double atof(
const char *string
);
double _wtof(
const wchar_t *string
);
int atoi(
const char *string
);
__int64 _atoi64(
const char *string
);
int _wtoi(
const wchar_t *string
);
__int64 _wtoi64(
const wchar_t *string
);
long atol(
const char *string
);
long _wtol(
const wchar_t *string
);
Convert strings to a double-precision value.
double strtod(
const char *nptr,
char **endptr
);
double wcstod(
const wchar_t *nptr,
wchar_t **endptr
);
Convert an integer to a string.
char *_itoa(
int value,
char *string,
int radix
);
char *_i64toa(
__int64 value,
char *string,
int radix
);
char * _ui64toa(
unsigned _int64 value,
char *string,
int radix
);
wchar_t * _itow(
int value,
wchar_t *string,
int radix
);
wchar_t * _i64tow(
__int64 value,
wchar_t *string,
int radix
);
wchar_t * _ui64tow(
unsigned __int64 value,
wchar_t *string,
int radix
);
Convert a long integer to a string.
char *_ltoa(
long value,
char *string,
int radix
);
wchar_t *_ltow(
long value,
wchar_t *string,
int radix
);
unsigned long to string
char *_ultoa(
unsigned long value,
char *string,
int radix
);
wchar_t *_ultow(
unsigned long value,
wchar_t *string,
int radix
);
Converts a double number to a string.
char *_ecvt(
double value,
int count,
int *dec,
int *sign
);
Parameters
value
Number to be converted.
count
Number of digits stored.
dec
Stored decimal-point position.
sign
Sign of converted number.
Converts a floating-point number to a string.
char *_fcvt(
double value,
int count,
int *dec,
int *sign
);
Parameters
value
Number to be converted.
count
Number of digits after decimal point.
dec
Pointer to stored decimal-point position.
sign
Pointer to stored sign indicator.
Converts a floating-point value to a string, which it stores in a buffer.
char *_gcvt(
double value,
int digits,
char *buffer
);
Parameters
value
Value to be converted.
digits
Number of significant digits stored.
buffer
Storage location for result.
Return Value
_gcvt returns a pointer to the string of digits. There is no error return.
|
| Цитата |
2) В C++ можно задать динамич. массив?
|
Да
| Код |
int* arr = new int[size];
int* 2Darr = new int*[size1];
for ( int i=0; i<size2; i++)
{
2Darr[i] = new int[size2];
}
....
|
Добавлено @ 22:52
Блин, ошибся, нельзя использовать имя 2Darr =) |
