std::getchar

 

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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 ASCIIreturnEXIT_SUCCESS;}   // Test reason for reaching EOF.if(std::feof(stdin))// if failure caused by end-of-file conditionstd::cout<<"End of file reached\n";elseif(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);}   returnEXIT_SUCCESS;}

Possible output:

abc a b c ^[

See also

fgetcgetc	gets a character from a file stream (function)
C documentation for getchar