CC78K4 datasheet(210/523 Pages) NEC

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CHAPTER 10 LIBRARY FUNCTIONS

User’s Manual U15556EJ1V0UM

210

5-13

itoa,

Utility Functions

ltoa,

ultoa

FUNCTION

The string function itoa converts an int integer to its string equivalent.

The string function ltoa converts a long integer to its string equivalent.

The string function ultoa converts an unsigned long integer to its string equivalent.

HEADER

stdlib. h

FUNCTION PROTOTYPE

char *itoa (int value, char *string, int radix);

char *ltoa (long value, char *string, int radix);

char *ultoa (unsigned long value, char *string, int radix);

Function

Arguments

Return Value

itoa,

ltoa,

ultoa

value ... String to which

integer is to be converted

string ... Pointer to the

conversion result

radix ... Base of output string

• Pointer to the converted

string if converted properly

• Null pointer if not converted

properly

EXPLANATION

itoa, ltoa, ultoa

•

The itoa, ltoa, and ultoa functions all convert the integer value specified by value to its string equivalent,

which is terminated with a null character, and store the result in the area pointed to by “string”.

•

The base of the output string is determined by radix, which must be in the range 2 through 36. Each function

performs conversion based on the specified radix and returns a pointer to the converted string.

If the

specified radix is outside the range 2 through 36, the function performs no conversion and returns a null

pointer.

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