String format decimal places c++

//%f 	// placeholder for a float value
//%.2f 	//as a placeholder, your float will be written rounded to 2 decimal places
		// if you require a truncated representation, consider
		// integer division or std::trunc() from <math.h> or <cmath>

// example string:
printf("Your total is $%.2f", 30.999);
//output:
//Your total is $31.00

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