If the resulting value is too large or too small to fit in a long int, the value LONG_MAX or LONG_MIN is returned, and errno is set to ERANGE. See Also atol function, strtod function, strtoul function, wcstol in <cwchar>
In this example, we create a basic c program to demonstrate how to use the strtol() function.Open Compiler #include <stdio.h> #include <stdlib.h> int main() { const char *str = "12345abc"; char *endptr; long int num; // Convert the string to a long integer num = strtol(str,...
{ // errno can be set to any non-zero value by a library function call // regardless of whether there was an error, so it needs to be cleared // in order to check the error set by strtol errno = 0; char* end; const long i = strtol(p, &end, 10); if (p == end) break...
The second parameter,endptr, is a pointer to a pointer. If its argument value is not a null pointer, then the function stores a pointer to the first character ... GetC in a Nutshellnow with the O’Reillylearning platform. O’Reilly members experience books, live events, courses curated ...
strtod returns the value of the floating-point number, except when the representation would cause an overflow, in which case the function returns +/–HUGE_VAL. The sign of HUGE_VAL matches the sign of the value that cannot be represented. strtod returns 0 if no conversion can be performed ...
The _itoa, _i64toa, and _ui64toa function convert the digits of the given value argument to a null-terminated character string and stores the result (up to 33 bytes) in string. If radix equals 10 and value is negative, the first character of the stored string is the minus...
strtodreturns the value of the floating-point number, except when the representation would cause an overflow, in which case the function returns +/–HUGE_VAL. The sign ofHUGE_VALmatches the sign of the value that cannot be represented.strtodreturns 0 if no conversion can be performed or an ...
{ // errno can be set to any non-zero value by a library function call // regardless of whether there was an error, so it needs to be cleared // in order to check the error set by strtol errno = 0; char* p_end{}; const long i = std::strtol(p, &p_end, 10); if (p ...