我使用以下函数在 c 中生成动态二维数组:
int** Make2DintArray(int arraySizeX, int arraySizeY) { // From http://pleasemakeanote.blogspot.com/2008/06/2d-arrays-in-c-using-malloc.html
int** theArray;
theArray = (int**) malloc(arraySizeX*sizeof(int*));
for (int i = 0; i < arraySizeX; i++)
theArray[i] = (int*) malloc(arraySizeY*sizeof(int));
return theArray;
}
我想连接矩阵(2d - 数组)的所有值以形成一个由 # 分隔的字符串
我用了
int hi11cipherSize = 20;
std::ostringstream text2Encrypt;///ERROR SOURCE
// i used the above function to creat a 2D array and fill it
// then i used the code below to loop through the record and create the string with delimiter #
for(int i =0; i<hi11cipherSize;i++){
for(int j =0; j<hi11cipherSize;j++){
printf("%d \t",HillCipherMatrix[i][j]);
temp = HillCipherMatrix[i][j];
text2Encrypt<<(char)temp<<"#"; //// First error cannot concatenate int with char ???
} printf("\n");
}
QString tempHLBP = QString::fromStdString(text2Encrypt.str()) ;
qDebug()<<"Text to encrypt "<<tempHLBP<<"\n";
qDebug()<<"Length of string "<<tempHLBP.length();
我收到以下错误错误:
22:37:59: Running build steps for project StringManJVN...
22:37:59: Configuration unchanged, skipping qmake step.
22:37:59: Starting: "C:\QtSDK\QtCreator\bin\jom.exe"
main.cpp
main.cpp(17) : error C2079: 'text2Encrypt' uses undefined class 'std::basic_ostringstream<_Elem,_Traits,_Alloc>'
with
[
_Elem=char,
_Traits=std::char_traits<char>,
_Alloc=std::allocator<char>
]
main.cpp(27) : error C2297: '<<' : illegal, right operand has type 'const char [2]'
main.cpp(27) : warning C4552: '<<' : operator has no effect; expected operator with side-effect
main.cpp(32) : error C2228: left of '.str' must have class/struct/union
type is 'int'
jom: C:\QTProject\StringManJVN\Makefile.Debug [debug\main.obj] Error 2
cl -c -nologo -Zm200 -Zc:wchar_t- -Zi -MDd -GR -EHsc -W3 -w34100 -w34189 -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_SQL_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_THREAD_SUPPORT -I"..\..\QtSDK\Desktop\Qt\4.8.1\msvc2010\include\QtCore" -I"..\..\QtSDK\Desktop\Qt\4.8.1\msvc2010\include\QtSql" -I"..\..\QtSDK\Desktop\Qt\4.8.1\msvc2010\include" -I"..\..\QtSDK\Desktop\Qt\4.8.1\msvc2010\include\ActiveQt" -I"debug" -I"..\..\QtSDK\Desktop\Qt\4.8.1\msvc2010\mkspecs\win32-msvc2010" -Fodebug\ @C:\Users\SONUT\AppData\Local\Temp\main.obj.3948.0.jom
C:\QtSDK\QtCreator\bin\jom.exe -f Makefile.Debug
jom 1.0.8 - empower your cores
jom: C:\QTProject\StringManJVN\Makefile [debug] Error 2
22:38:02: The process "C:\QtSDK\QtCreator\bin\jom.exe" exited with code 2.
Error while building project StringManJVN (target: Desktop)
When executing build step 'Make'
提前致谢 ;-))