本文整理汇总了C++中Constant::Value方法的典型用法代码示例。如果您正苦于以下问题：C++ Constant::Value方法的具体用法？C++ Constant::Value怎么用？C++ Constant::Value使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Constant的用法示例。
在下文中一共展示了Constant::Value方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ReadXML
int VectorField::ReadXML(string xmlfilename)
{
FILE *xmlfile;
mxml_node_t *tree;
mxml_node_t *node;
bool bad_attr;
xmlfile = fopen(xmlfilename.c_str(),"r");
if (xmlfile == NULL)
{
// Failed to open the file.
cerr << "Error: Unable to open " << xmlfilename << "\n";
exit(-1);
}
tree = mxmlLoadFile(NULL,xmlfile,MXML_NO_CALLBACK);
fclose(xmlfile);
if (tree == NULL)
{
cerr << "Error: Unable to load the vector field from the file " << xmlfilename << ".\n";
cerr << "There may be an error in the XML definition of the vector field.\n";
mxmlDelete(tree);
exit(-1);
}
node = mxmlFindElement(tree,tree,"VectorField",NULL,NULL,MXML_DESCEND);
if (node == NULL)
{
cerr << "Error: No VectorField element found in XML defintion.\n";
mxmlDelete(tree);
exit(-1);
}
else
{
bad_attr = false;
for (int i = 0; i < node->value.element.num_attrs; ++i)
{
string attr = node->value.element.attrs[i].name;
if (attr != "Name" && attr != "IndependentVariable" && attr != "Description")
{
cerr << "Error: The VectorField element has an unknown attribute: " << attr << endl;
bad_attr = true;
}
}
if (bad_attr)
exit(-1);
const char *attr;
attr = mxmlElementGetAttr(node,"Name");
if (attr == NULL)
{
cerr << "Error: The VectorField element has no Name attribute.\n";
mxmlDelete(tree);
exit(-1);
}
else
{
if (!isValidName(attr))
{
cerr << "Error: The VectorField Name \"" << attr << "\" is not valid.\n";
mxmlDelete(tree);
exit(-1);
}
string s(attr);
Name(s);
}
attr = mxmlElementGetAttr(node,"Description");
if (attr != NULL)
{
string s(attr);
Description(s);
}
attr = mxmlElementGetAttr(node,"IndependentVariable");
if (attr == NULL)
IndependentVariable = "t";
else
{
if (!isValidName(attr))
{
cerr << "Error: The VectorField IndependentVariable \"" << attr << "\" is not valid.\n";
mxmlDelete(tree);
exit(-1);
}
string s(attr);
IndependentVariable = s;
}
}
//
// Get the constants
//
for (node = mxmlFindElement(tree,tree,"Constant",NULL,NULL,MXML_DESCEND);
node != NULL;
node = mxmlFindElement(node,tree,"Constant",NULL,NULL,MXML_DESCEND))
{
bad_attr = false;
for (int i = 0; i < node->value.element.num_attrs; ++i)
{
string attr = node->value.element.attrs[i].name;
if (attr != "Name" && attr != "Value" && attr != "Description" && attr != "Latex")
{
cerr << "Error: A Constant element has an unknown attribute: " << attr << endl;
//.........这里部分代码省略.........