Re: assignment/initialization of container - map
Ron Natalie wrote:
xuatla wrote:
Hi,
I want to define a map:
std::map<string, int> myMap;
e.g., the score of students. Then I can assign the value as follows:
myMap["stud1"] = 90;
myMap["stud2"] = 60;
...
My question now is: can I assign the name of many students in one
line? e.g., for array we have the following way:
int myArray[] = { 1, 3, 4, 5 };
Do we have similar way for map?
std::map<string, int> myMap = { ("stud1", 90), ("stud2", 60) };
// wrong co
No, map's not an aggregate.
The best you can do is something like:
struct apair {
const char* s;
int i;
} maptab[] = { { "stud1", 90 }, ....
for(apair* ap = maptab; ap != sizeof maptab/sizeof (apair); ++ap)
myMap[ap->s] = ap->i;
Shouldn't this work
std::map<string,int> myMap(maptab, maptab +
sizeof(maptab)/sizeof(*maptab));
? You might find that using [] instead of .insert() is less efficient.
V
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