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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, addition- ally 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 con- dition 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) http://cppreference.com 2022.07.31 std::getchar(3)
NAME | Synopsis | Parameters | Return value | Example | Possible output: | See also
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