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To pass a single format variable to std::printf in C++, you can use the following syntax:
std::printf("%s", formatVariable);
In this example, the format variable is a string (char array) denoted by "%s" in the format string.
You can replace "%s" with any other format specifier depending on the type of the format variable. For example, "%d" for integer, "%f" for float/double, "%c" for char, and so on.