Initializing help system before first use

# printf

Purpose
Send a message to the current output stream.
Synopsis
`int printf(XPRMcontext ctx, const char *format, ...);`
Arguments

ctx | Mosel's execution context
format | printf style format

Return value
The number of characters printed or -1 in the case of an error.
Further information
This function sends a message to the current output stream of the running model. The parameters expected by this function correspond to those of the standard C function printf. The special format %r can also be used to display real values: it implies the use of the format specified by control parameter realfmt (see getparam).
Related topics
dispmsg.
Parent Topic Input and output

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