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From: Kenshin on 14 Dec 2009 22:36
I am attemting to compile the code below, using MinGW on windows, as
below:
g++ -std=c++0x -Wall -Os -o varTest varTest.cpp

I receive the following compilation error:
In file included from d:\apps\qt\2009.05\mingw\bin\../lib/gcc/
mingw32/4.4.0/incude/c++/bits/postypes.h:42,
from d:\apps\qt\2009.05\mingw\bin\../lib/gcc/mingw32/4.4.0/incude/c++/
iosfwd:42,
from d:\apps\qt\2009.05\mingw\bin\../lib/gcc/mingw32/4.4.0/incude/c++/
ios:39,
from d:\apps\qt\2009.05\mingw\bin\../lib/gcc/mingw32/4.4.0/incude/c++/
ostream:40,
from d:\apps\qt\2009.05\mingw\bin\../lib/gcc/mingw32/4.4.0/incude/c++/
iostream:40,

from varTest.cpp:1:
d:\apps\qt\2009.05\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/
cwchar:159: eror: '::swprintf' has not been declared
d:\apps\qt\2009.05\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/
cwchar:166: eror: '::vswprintf' has not been declared

varTest.cpp: In function 'int main(int, char**)':
varTest.cpp:73: error: no matching function for call to 'sum(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'
varTest.cpp:74: error: no matching function for call to 'minus(int,
int, int, it, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int, it, int, int)'
varTest.cpp:75: error: no matching function for call to 'min(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'
varTest.cpp:76: error: no matching function for call to 'max(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'
varTest.cpp:77: error: no matching function for call to 'avg(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'


I am more concerned about the potion below:
varTest.cpp: In function 'int main(int, char**)':
varTest.cpp:73: error: no matching function for call to 'sum(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'
varTest.cpp:74: error: no matching function for call to 'minus(int,
int, int, it, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int, it, int, int)'
varTest.cpp:75: error: no matching function for call to 'min(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'
varTest.cpp:76: error: no matching function for call to 'max(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'
varTest.cpp:77: error: no matching function for call to 'avg(int, int,
int, int int, int, int, int, int, int, int, int, int, int, int, int,
int, int, int, int int, int)'

Why am I getting this error? (Source code is below).

#include <iostream>

namespace kgm{

template<class T1, class T2>
auto sum(const T1& t1, const T2& t2)->decltype(t1+t2){

return (t1+t2);

}

template<class T1, class T2, class...T3>
auto sum(const T1& t1, const T2& t2, const T3&... t3)->decltype(t1 +
sum(t2, t3...)){

return (t1 + sum(t2, t3...));

}

template<class T1, class T2>
auto minus(const T1& t1, const T2& t2)->decltype(t1-t2){

return (t1-t2);

}

template<class T1, class T2, class...T3>
auto minus(const T1& t1, const T2& t2, const T3&... t3)->decltype(t1
- minus(t2, t3...)){

return (t1 - minus(t2, t3...));

}

template<class T1, class T2>
auto min(const T1& t1, const T2& t2)->decltype((t1 < t2) ? t1 : t2){

return ((t1 < t2) ? t1 : t2);

}

template<class T1, class T2, class...T3>
auto min(const T1& t1, const T2& t2, const T3&... t3)->decltype(min
(((t1 < t2) ? t1 : t2), t3...)){

return min(((t1 < t2) ? t1 : t2), t3...);

}

template<class T1, class T2>
auto max(const T1& t1, const T2& t2)->decltype((t2 < t1) ? t1 : t2){

return ((t2 < t1) ? t1 : t2);

}

template<class T1, class T2, class...T3>
auto max(const T1& t1, const T2& t2, const T3&... t3)->decltype(max
(((t2 < t1) ? t1 : t2), t3...)){

return max(((t2 < t1) ? t1 : t2), t3...);

}

template<class T1, class T2, class...T3>
auto avg(const T1& t1, const T2& t2, const T3&... t3)->decltype(sum
(t1, t2, t3...)/(2 + sizeof...(T3))){

return (sum(t1, t2, t3...)/(2 + sizeof...(T3)));

}

}//end namespace kgm//


int main(int argc, char** argv){

std::cout << "\nSum:\t" << kgm::sum
(1,2,3,4,5,6,7,8,9,11,22,33,44,55,66,77,88,99,0,2243,675,91) <<
std::endl;
std::cout << "\nMinus:\t" << kgm::minus
(1,2,3,4,5,6,7,8,9,11,22,33,44,55,66,77,88,99,0,2243,675,91) <<
std::endl;
std::cout << "\nMin:\t" << kgm::min
(1,2,3,4,5,6,7,8,9,11,22,33,44,55,66,77,88,99,0,2243,675,91) <<
std::endl;
std::cout << "\nMax:\t" << kgm::max
(1,2,3,4,5,6,7,8,9,11,22,33,44,55,66,77,88,99,0,2243,675,91) <<
std::endl;
std::cout << "\nAvg:\t" << kgm::avg
(1,2,3,4,5,6,7,8,9,11,22,33,44,55,66,77,88,99,0,2243,675,91) <<
std::endl;
std::cout << std::endl;

}//end main//


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