Results for “to_char”
Small, practical examples. Search by task or narrow things down below.
Convert ASCII text to lowercase safely
C++: Cast each byte to unsigned char before using the cctype function.
C++✓ Tested
Convert ASCII text to lowercase safely
C: Cast to unsigned char before calling ctype functions on a possibly signed char.
C✓ Tested
Convert ASCII text to uppercase
Convert characters with toupper while avoiding signed-char undefined behavior.
C✓ Tested
Convert Celsius to Fahrenheit
Arduino / C: Use floating-point constants to avoid integer division.
Arduino / C✓ Tested
Convert received ASCII letters to uppercase
Arduino / C: ctype functions should receive an unsigned character value.
Arduino / C✓ Tested
Copy a file to a chosen destination
PowerShell: LiteralPath prevents wildcard characters in the source filename from being interpreted.
PowerShell✓ Tested
Copy a flash string into a bounded RAM buffer
Arduino / C: strncpy_P reads from program memory into ordinary RAM.
Arduino / C✓ Tested
Copy a multibyte interrupt-owned counter atomically
Arduino / C: ATOMIC_RESTORESTATE restores the interrupt state after reading a shared value.
Arduino / C✓ Tested
Copy a string with a guaranteed terminator
Arduino / C: Reserve one character for the terminator when copying a bounded string.
Arduino / C✓ Tested
Count a button’s falling edge in the main loop
Arduino / C: Compare each reading with the previous state to detect transitions.
Arduino / C✓ Tested
Count a falling edge with an interrupt
Increment a counter when an external input changes.
attachInterrupt✓ Tested
Count a rising edge with an interrupt
Arduino / C: RISING triggers when the input changes from low to high.
Arduino / C✓ Tested