C's Standard Libraries

Objectives

This section is only for reference! It contains the following information:

1. Names of all C's Standard Libraries
2. The functions they contain

Input and Output: <stdio.h>

FILE *fopen(const char *filename, const char *mode)

FILE *freopen(const char *filename, const char *mode, FILE *stream)

int fflush(FILE *stream)

int fclose(FILE *stream)

int remove(const char *filename)

int rename(const char *oldname, const char *newname)

FILE *tmpfile(void)

char *tmpnam(char s[L_tmpnam])

int setvbuf(FILE *stream, char *buf, int mode, size_t size)

void setbuf(FILE *stream, char *buf)

int fprint(FILE *stream, const char *format, ...)

int sprintf(char *s, const char *format, ...)

vprintf(const char *format, va_list arg)

vfprintf(FILE *stream, const char *format, va_list arg)

vsprintf(char *s, const char *format, va_list arg)

int fscanf(FILE *stream, const char *format, ...)

int scanf(const char *format, ...)

int sscanf(char *s, const char *format, ...)

int fgetc(FILE *stream)

char *fgets(char *s, int n, FILE *stream)

int fputc(int c, FILE *stream)

int fputs(const char *s, FILE *stream)

int getc(FILE *stream)

int getchar(void)

char *gets(char *s)

int putc(int c, FILE *stream)

int putchar(int c)

int ungetc(int c, FILE *stream)

size_t fread(void *ptr, size_t size, size_t nobj, FILE *stream)

size_t fwrite(const void *ptr, size_t size, size_t nobj, FILE *stream)

int fseek(FILE *stream, long offset, int orogin)

long ftell(FILE *stream)

void rewind(FILE *stream)

int fgetpos(FILE *stream, fpos_t *ptr)

int fsetpos(FILE *stream, const fpos_t *ptr)

void clearerr(FILE *stream)

int feof(FILE *stream)

int ferror(FILE *stream)

void perror(const char *s)

Character Class Tests: <ctype.h>

isalnum(c)

isalpha(c)

iscntrl(c)

isdigit(c)

isgraph(c)

islower(c)

isprint(c)

ispunct(c)

isspace(c)

isupper(c)

isxdigit(c)

String Functions: <string.h>

char *strcpy(s , ct)

char *strncpy(s , ct , n)

char *strcat(s , ct)

char *strncat(s , ct , n)

int strcmp(cs , ct)

int strncmp(cs , ct ,n)

char *strchr(cs , c)

char *strrchr(cs , c)

size_t strspn(cs , ct)

size_t strcspn(cs , ct)

char *strstr(cs , ct)

size_t strlen(cs)

char *strerror(n)

char *strtok(s , ct)

Mathematical Functions: <math.h>

sin(x)

cos(x)

tan(x)

asin(x)

acos(x)

atan(x)

atan2(x)

sinh(x)

cosh(x)

tanh(x)

exp(x)

log(x)

log10(x)

pow(x,y)

sqrt(x)

ceil(x)

floor(x)

fabs(x)

ldexp(x)

frexp(x,double *ip)

modf(x,double *ip)

fmod(x,y)

Utility Functions: <stdlib.h>

double atof(const char *s)

int atoi(const char *s

long atol(const char *s)

double strrod(const char *s, char **endp)

long strtol(const char *s, char **endp, int base)

unsigned long strtoul(const char *s, char **endp, int base)

int rand(void)

void srand(unsigned int seed)

void *calloc(size_t nobj, size_t size)

void *malloc(size_t size)

void *realloc(void *p, size_t size)

void free(void *p)

void abort(void)

void exit(int status)

int atexit(void (*fcn)(void))

int system(const char *s)

char *getenv(const char *name)

void *bsearch(const void *key, const void *base, size_t n, size_t size, int (*cmp)(const void *keyval, const void *datum))

void qsort(void *base, size_t n, size_t size, int (*cmp)(const void *, const void *))

int abs(int n)

long labs(long n)

div_t div(int num, int denom)

ldiv_t ldiv(long num , long denom)

Diagnostics: <assert.h>

void assert(int expression)

Non-local Jumps: <setjmp.h>

int setjmp(jmp_buf env)

void longjmp(jmp_buf env, int val)

Signals: <signal.h>

void (*signal(int sig, void (*handler)(int)))(int)

Data and Time Functions: <time.h>

clock_t clock(void)

time_t time(time_t , *tp

double difftime(time_t time2 , time_t time1)

time_t mktime(struct tm *tp)

char *asctime(const time_t *tp)

char *ctime(const time_t *tp)

struct tm *gmtime(const time_t *tp)

struct tm *localtime(const time_t *tp)

size_t strftime(char *s, size_t smax, const char *fmt, const struct tm *tp)

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