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Using input/output string streams for dynamic reading
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// Example program | |
#include <iostream> | |
#include <string> | |
#include <sstream> | |
#include <vector> | |
#include <exception> | |
using namespace std; | |
int main() | |
{ | |
ostringstream output; | |
try { | |
output.exceptions(std::ios_base::failbit | std::ios_base::badbit); | |
int a_int = 1; | |
int a_bool = false; | |
vector<string> a{"test", "test2"}; | |
output << a_int << endl; | |
output << a.size() << endl; | |
output << a[0] << endl; | |
output << a[1] << endl; | |
output << a_bool << endl; | |
cout << output.str() << endl; | |
} catch (const std::ios_base::failure& e) { | |
std::cout << "Exception writing\n"; | |
return 1; | |
} | |
try { | |
istringstream input(output.str()); | |
input.exceptions(std::ios_base::failbit | std::ios_base::badbit); | |
int b_int; | |
size_t b_size; | |
vector<string> b; | |
bool b_bool; | |
input >> b_int; | |
cout << b_int << endl; | |
input >> b_size; | |
cout << b_size << endl; | |
b.resize(b_size); | |
int test_exception; | |
input >> test_exception; // exception here | |
for (size_t i = 0; i < b_size; ++i) { | |
string tmp; | |
input >> tmp; | |
b[i] = tmp; | |
cout << tmp << endl; | |
} | |
input >> b_bool; | |
cout << b_bool; | |
} catch (const std::ios_base::failure& e) { | |
std::cout << "Exception reading: " << e.what(); | |
return 1; | |
} | |
return 0; | |
} |
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