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#include <iostream>
#include <fstream>
#include <cstring>
// Exercise 1
void ex1() {
int a, b, c;
std::cin >> a >> b >> c;
std::ofstream resultFile("result.txt");
resultFile << (a + b + c) << " " << (a * b * c);
resultFile.close();
std::ifstream resultedFile("result.txt");
int sum, prod;
resultedFile >> sum >> prod;
std::cout << (sum - prod);
resultedFile.close();
}
// Exercise 2
const int BUFF_SIZE = 1024;
int strlen(char* const str) {
int ind = 0;
while (str[ind] != '\0')
ind++;
return ind;
}
int lengthOfFile(std::ifstream& file) {
int len = 0;
char buffer[BUFF_SIZE];
while (!file.eof()) {
file.getline(buffer, BUFF_SIZE);
len += strlen(buffer);
}
return len;
}
void ex2() {
std::ifstream resultFile("result.txt");
std::cout << lengthOfFile(resultFile) << std::endl;
resultFile.close();
}
// Exercise 3
struct Pair {
unsigned int left;
unsigned int right;
};
Pair createPair(unsigned int left, unsigned int right) {
return { left, right };
}
Pair readPairFromFile(std::ifstream& inFile) {
unsigned int left, right;
inFile >> left >> right;
return createPair(left, right);
}
void writePairToFile(std::ofstream& outFile, Pair pr) {
outFile << pr.left << " " << pr.right << std::endl;
}
void printPair(Pair pr) {
std::cout << "(" << pr.left << "," << pr.right << ")" << std::endl;
}
const int MAX_REL_SIZE = 25;
struct Relation {
Pair pairs[MAX_REL_SIZE];
int size;
};
Relation initRelation() {
return { {}, 0 };
}
bool addPairToRelation(Relation& rel, Pair pr) {
if (rel.size == MAX_REL_SIZE)
return false;
rel.pairs[rel.size++] = pr;
return true;
}
Relation readRelationFromFile(std::ifstream& inFile) {
Relation rel = initRelation();
while (!inFile.eof())
addPairToRelation(rel, readPairFromFile(inFile));
return rel;
}
void writeRelationToFile(Relation rel, std::ofstream& outFile) {
for (int i = 0; i < rel.size; i++)
writePairToFile(outFile, rel.pairs[i]);
}
void ex3() {
Relation rel = {
{ { 0, 1 }, {2, 3}, {5, 5}, {9, 100} }, 4
};
std::ofstream outFile("relation.txt");
writeRelationToFile(rel, outFile);
outFile.close();
std::ifstream inFile("relation.txt");
if (!inFile.is_open())
std::cout << "Bruh" << std::endl;
rel = readRelationFromFile(inFile);
for (int i = 0; i < rel.size; i++)
printPair(rel.pairs[i]);
inFile.close();
}
int main() {
ex3();
}
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