ISO C99 Manual Page

<< BACK NOTE: This is not the official manual to the C Programming Language (aka ISO C99, now ISO/IEC 9899:2024 aka C23).
This is just a place for reference, the official C manual might be kinda hard to read: official C manual, ISO/IEC 9899:2024

complex.h

• cabs()
• carg()
• cimag()
• creal()

ctype.h

• isalnum()
• isalpha()
• isdigit()
• isspace()

errno.h

• errno()
• perror()
• strerror()

limits.h

locale.h

math.h

• sin()
• cos()
• tan()
• sqrt()

regex.h

search.h

semaphore.h

stdarg.h

stddef.h

stdint.h

stdio.h

• printf()
• fprintf()
• sprintf()
• scanf()
• fopen()
• fclose()

stdlib.h

• malloc()
• free()
• atoi()
• atol()
• atoll()
• strtol()
• strtoll()
• strtoul()
• strtoull()
• atof()
• strtof()
• strtod()
• strtold()
• exit()

string.h

• mempcpy()
• strcpy()
• strcat()
• strlen()
• strcmp()

strings.h

• strcasecmp()

time.h

• time()
• difftime()
• mktime()

unistd.h

• getpid()
• fork()
• exec()

Command-line Tools

Compilers

• clang
• make
• gcc

• valgrind