Undeclared Identifier
Dec 26, 2017 at 6:47pm UTC
I get the following error: Use of undeclared identifier 'i'
In the class PlayerClass. How would I go about fixing this?
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#include <iostream>
#include <string>
#include <cstdlib>
#include <algorithm>
#include <ctime>
#include <tuple>
#include <vector>
#include <array>
#include <valarray>
#include <fstream>
#include <iomanip>
#include <cassert>
using namespace std;
struct Ability {
string name;
int level_adder;
int cost(int level, int intelligence) {
return (level + level_adder) * intelligence;
}
bool can_afford(int level, int intelligence, int manna) {
return cost(level, intelligence) <= manna;
}
void show(int level, int intelligence) {
std::cout << name << "[" << cost(level, intelligence) << " manna]\n" ;
}
};
class PlayerClass {
string name;
vector<Ability> abilities;
size_t ability_count() { return abilities.size(); }
void show(int level, int intelligence) {
for (int i=0; i<abilities.size(); i++)
std::cout << "[" << i << "] " ;
abilities[i].show(level, intelligence);
}
Ability const &operator [](size_t index) const {
return abilities.at(index);
}
};
class Player {
string name; // player name
int health = 100; // player health
int mana = 20; // player mana
int strength = 5; // strength [what it does]
int intelligence = 5; // intelligence [what it does]
int agility = 5; // agility [what it does]
int level = 0; // player level
int xp = 0; // experence
int xprequired = 50; // amount of xp is required to level up
int xpincrease = 25; // increases each level, adds to 'xprequired'
};
int main() {
return 0;
}
Last edited on Dec 26, 2017 at 6:47pm UTC
Dec 26, 2017 at 7:06pm UTC
If you don't have brackets in your for loop only the next statement becomes apart of its scope.
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for (int i=0; i<abilities.size(); i++) //variable i declared in for loop
std::cout << "[" << i << "] " ;//still part of for loop
abilities[i].show(level, intelligence);//not part of for loop, out of scope, compiler does not know what "i" is.
Last edited on Dec 26, 2017 at 7:07pm UTC
Dec 26, 2017 at 7:07pm UTC
Line 40: This is the only line that is within scope of the for loop and therefore the only line where i is in scope. If you want lines 40 and 41 to both be in scope of the for loop, use {} to bracket both lines.
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