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std::puts(3) C++ Standard Libary std::puts(3) NAME std::puts - std::puts Synopsis Defined in header <cstdio> int puts( const char *str ); Writes every character from the null-terminated string str and one additional newline character '\n' to the output stream stdout, as if by repeat- edly executing std::fputc. The terminating null character from str is not written. Parameters str - character string to be written Return value On success, returns a non-negative value On failure, returns EOF and sets the error indicator (see std::fer- ror) on stdout. Notes The std::puts function appends the newline character to the output, while std::fputs function does not. Different implementations return different non-negative numbers: some return the last character written, some return the number of characters written (or INT_MAX if the string was longer than that), some simply return a non-negative constant. A typical cause of failure for std::puts is running out of space on the file system, when stdout is redirected to a file. Example // Run this code #include <cstdio> int main() { int rc = std::puts("Hello World"); if (rc == EOF) std::perror("puts()"); // POSIX requires that errno is set } Output: Hello World See also fputs writes a character string to a file stream (function) printf fprintf prints formatted output to stdout, a file stream or a buffer sprintf (function) snprintf (C++11) http://cppreference.com 2022.07.31 std::puts(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Output: | See also
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