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Full Discussion: time in microseconds
Top Forums Programming time in microseconds Post 25370 by Optimus_P on Monday 29th of July 2002 12:58:58 PM
Old 07-29-2002
just a little more help for the C noob like myself.
i get these errors when i try to compile it. I must admit i do not know C.


OS=sol8
platform=E3500 (sparc)

Code:
$ cat milli.c

#include <stdlib.h>
#include <sys/time.h>

struct timeval tv;
struct timezone tz;
struct tm *tm;
gettimeofday(&tv, &tz);
tm=localtime(&tv.tv_sec);
printf(" %d:%02d:%02d %d \n", tm->tm_hour, tm->tm_min
,m->tm_sec, tv.tv_usec);


$ gcc milli.c
milli.c:7: parse error before '&' token
milli.c:7: warning: data definition has no type or storage class
milli.c:8: conflicting types for `tm'
milli.c:6: previous declaration of `tm'
milli.c:8: warning: initialization makes integer from pointer without a cast
milli.c:8: initializer element is not constant
milli.c:8: warning: data definition has no type or storage class
milli.c:9: parse error before string constant
milli.c:10: warning: conflicting types for built-in function `printf'
milli.c:10: warning: data definition has no type or storage class

 

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LEARN ABOUT CENTOS

std::chrono

std::chrono(3)						     Library Functions Manual						    std::chrono(3)

NAME

       std::chrono -

SYNOPSIS

   Classes
       struct duration
       struct duration_values
       struct time_point
       struct treat_as_floating_point

   Typedefs
       typedef duration< int, ratio< 3600 > > hours
       typedef duration< int64_t, micro > microseconds
       typedef duration< int64_t, milli > milliseconds
       typedef duration< int, ratio< 60 > > minutes
       typedef duration< int64_t, nano > nanoseconds
       typedef duration< int64_t > seconds

   Functions
       template<typename _ToDur , typename _Rep , typename _Period > constexpr enable_if
	   < __is_duration< _ToDur >
	   ::value, _ToDur >::type duration_cast (const duration< _Rep, _Period > &__d)"
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool operator!= (const duration< _Rep1,
	   _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool operator!= (const time_point< _Clock, _Dur1 > &__lhs, const
	   time_point< _Clock, _Dur2 > &__rhs)
       template<typename _Rep1 , typename _Period , typename _Rep2 > constexpr duration< typename
	   __common_rep_type< _Rep1,
	   typename enable_if
	   <!__is_duration< _Rep2 >
	   ::value, _Rep2 >::type >::type,
	   _Period > operator% (const duration< _Rep1, _Period > &__d, const _Rep2 &__s)"
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr common_type
	   < duration< _Rep1, _Period1 >
	   , duration< _Rep2, _Period2 >
	    >::type operator% (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)"
       template<typename _Rep1 , typename _Period , typename _Rep2 > constexpr duration< typename
	   __common_rep_type< _Rep1,
	   _Rep2 >::type, _Period > operator* (const duration< _Rep1, _Period > &__d, const _Rep2 &__s)"
       template<typename _Rep1 , typename _Rep2 , typename _Period > constexpr duration< typename
	   __common_rep_type< _Rep2,
	   _Rep1 >::type, _Period > operator* (const _Rep1 &__s, const duration< _Rep2, _Period > &__d)"
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr common_type
	   < duration< _Rep1, _Period1 >
	   , duration< _Rep2, _Period2 >
	    >::type operator+ (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)"
       template<typename _Clock , typename _Dur1 , typename _Rep2 , typename _Period2 > constexpr time_point< _Clock,
	   typename common_type< _Dur1,
	   duration< _Rep2, _Period2 >
	    >::type > operator+ (const time_point< _Clock, _Dur1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)"
       template<typename _Rep1 , typename _Period1 , typename _Clock , typename _Dur2 > constexpr time_point< _Clock,
	   typename common_type< duration
	   < _Rep1, _Period1 >, _Dur2 >
	   ::type > operator+ (const duration< _Rep1, _Period1 > &__lhs, const time_point< _Clock, _Dur2 > &__rhs)"
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr common_type
	   < duration< _Rep1, _Period1 >
	   , duration< _Rep2, _Period2 >
	    >::type operator- (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)"
       template<typename _Clock , typename _Dur1 , typename _Rep2 , typename _Period2 > constexpr time_point< _Clock,
	   typename common_type< _Dur1,
	   duration< _Rep2, _Period2 >
	    >::type > operator- (const time_point< _Clock, _Dur1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)"
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr common_type< _Dur1,
	   _Dur2 >::type operator- (const time_point< _Clock, _Dur1 > &__lhs, const time_point< _Clock, _Dur2 > &__rhs)"
       template<typename _Rep1 , typename _Period , typename _Rep2 > constexpr duration< typename
	   __common_rep_type< _Rep1,
	   typename enable_if
	   <!__is_duration< _Rep2 >
	   ::value, _Rep2 >::type >::type,
	   _Period > operator/ (const duration< _Rep1, _Period > &__d, const _Rep2 &__s)"
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr common_type< _Rep1,
	   _Rep2 >::type operator/ (const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)"
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool operator< (const duration< _Rep1,
	   _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool operator< (const time_point< _Clock, _Dur1 > &__lhs, const
	   time_point< _Clock, _Dur2 > &__rhs)
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool operator<= (const duration< _Rep1,
	   _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool operator<= (const time_point< _Clock, _Dur1 > &__lhs, const
	   time_point< _Clock, _Dur2 > &__rhs)
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool operator== (const duration< _Rep1,
	   _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool operator== (const time_point< _Clock, _Dur1 > &__lhs, const
	   time_point< _Clock, _Dur2 > &__rhs)
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool operator> (const duration< _Rep1,
	   _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool operator> (const time_point< _Clock, _Dur1 > &__lhs, const
	   time_point< _Clock, _Dur2 > &__rhs)
       template<typename _Rep1 , typename _Period1 , typename _Rep2 , typename _Period2 > constexpr bool operator>= (const duration< _Rep1,
	   _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
       template<typename _Clock , typename _Dur1 , typename _Dur2 > constexpr bool operator>= (const time_point< _Clock, _Dur1 > &__lhs, const
	   time_point< _Clock, _Dur2 > &__rhs)
       template<typename _ToDur , typename _Clock , typename _Dur > constexpr enable_if
	   < __is_duration< _ToDur >
	   ::value, time_point< _Clock,
	   _ToDur > >::type time_point_cast (const time_point< _Clock, _Dur > &__t)"

Detailed Description
       ISO C++ 2011 entities sub-namespace for time and date.

Typedef Documentation
   typedef duration<int, ratio<3600> > std::chrono::hours
       hours

       Definition at line 541 of file chrono.

   typedef duration<int64_t, micro> std::chrono::microseconds
       microseconds

       Definition at line 529 of file chrono.

   typedef duration<int64_t, milli> std::chrono::milliseconds
       milliseconds

       Definition at line 532 of file chrono.

   typedef duration<int, ratio< 60> > std::chrono::minutes
       minutes

       Definition at line 538 of file chrono.

   typedef duration<int64_t, nano> std::chrono::nanoseconds
       nanoseconds

       Definition at line 526 of file chrono.

   typedef duration<int64_t> std::chrono::seconds
       seconds

       Definition at line 535 of file chrono.

Function Documentation
   template<typename _ToDur , typename _Rep , typename _Period > constexpr enable_if<__is_duration<_ToDur>::value, _ToDur>::type
       std::chrono::duration_cast (const duration< _Rep, _Period > &__d)
       duration_cast

       Definition at line 193 of file chrono.

       Referenced by std::this_thread::sleep_for().

   template<typename _ToDur , typename _Clock , typename _Dur > constexpr enable_if<__is_duration<_ToDur>::value, time_point<_Clock, _ToDur>
       >::type std::chrono::time_point_cast (const time_point< _Clock, _Dur > &__t)
       time_point_cast

       Definition at line 602 of file chrono.

Author
       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++							  Tue Jun 10 2014						    std::chrono(3)
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