#include <stdlib.h>
double atof(char *string) - Convert string to floating point value.
int atoi(char *string) - Convert string to an integer value.
int atol(char *string) - Convert string to a long integer value.
char *itoa(int value, char *string, int radix) - Convert an integer value to a string using given radix.
char *ltoa(long value, char *string, int radix) - Convert long integer to string in a given radix.
double strtod(char *string, char *endptr) - Convert string to a floating point value.
long strtol(char *string, char *endptr, int radix) - Convert string to a long integer using a given radix.
unsigned long strtoul(char *string, char *endptr, int radix) - Convert string to unsigned long.