std::getchar(3) C++ Standard Libary std::getchar(3) NAME std::getchar - std::getchar Synopsis Defined in header <cstdio> int getchar(); Reads the next character from stdin. Equivalent to std::getc(stdin). Parameters (none) Return value The obtained character on success or EOF on failure. If the failure has been caused by end of file condition, additionally sets the eof indicator (see std::feof()) on stdin. If the failure has been caused by some other error, sets the error indicator (see std::ferror()) on stdin. Example std::getchar with error checking. Exit program by entering ESC char. #include <cctype> #include <cstdio> #include <cstdlib> #include <iomanip> #include <iostream> int main() { for (int ch; (ch = std::getchar()) != EOF ;) // read/print "abc" from stdin { if (std::isprint(ch)) std::cout << static_cast<char>(ch) << '\n'; if (ch == 27) // 'ESC' (escape) in ASCII return EXIT_SUCCESS; } // Test reason for reaching EOF. if (std::feof(stdin)) // if failure caused by end-of-file condition std::cout << "End of file reached\n"; else if (std::ferror(stdin)) // if failure caused by some other error { std::perror("getchar()"); std::cerr << "getchar() failed in file " << std::quoted(__FILE__) << " at line # " << __LINE__ - 14 << '\n'; std::exit(EXIT_FAILURE); } return EXIT_SUCCESS; } Possible output: abc a b c ^[ See also fgetc gets a character from a file stream getc (function) C documentation for getchar http://cppreference.com 2024.06.10 std::getchar(3)
NAME | Synopsis | Parameters | Return value | Example | Possible output: | See also
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