| Element | Effect(s) if set | 
| boolalpha | insert and extract bool type in alphabetic format | 
| dec | converts integer input or generates integer output in decimal base | 
| fixed | generate floating-point output in fixed-point notation | 
| hex | converts integer input or generates integer output in hexadecimal base | 
| internal | adds fill characters at a designated internal point in certain generated output,
 or identical to right if no such point is designated | 
| left | adds fill characters on the right (final positions) of certain generated output | 
| oct | converts integer input or generates integer output in octal base | 
| right | adds fill characters on the left (initial positions) of certain generated output | 
| scientific | generates floating-point output in scientific notation | 
| showbase | generates a prefix indicating the numeric base of generated integer output | 
| showpoint | generates a decimal-point character unconditionally in generated floating-point output | 
| showpos | generates a + sign in non-negative generated numeric output | 
| skipws | skips leading whitespace before certain input operations | 
| unitbuf | flushes output after each output operation | 
| uppercase | replaces certain lowercase letters with their uppercase equivalents in generated output |