Std::puts (3) Linux Manual Page

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 repeatedly 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::ferror) 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

std::puts (3) Linux Manual Page