String Examples

/*** simple declaration and input using scanf() ***/
#include <stdio.h>
#include <string.h>

int main(void)
{
  char name[5] = "John";
  char day[4] = {'W', 'e', 'd', '\0'};

  printf("\n%s %s \n", name, day);

  name[1] = 'a';
  name[2] = 'y';
  printf("\n%s %s\n", name, day);

  name[3] = '\0';
  printf("\n%s %s\n", name, day);

  printf("\nEnter a string no longer than 3 characters ");
  scanf("%s", day);

  printf("\n%s %s\n", name, day);

  return (0);
}



/*** problems and differences with scanf() and gets() ***/

#include <stdio.h>
#include <string.h>

int main(void)
{
  char stream[80], name[5];

  printf("\nEnter a name ");
  scanf("%s", name);

  gets(stream);
  printf("\nname = %s\nrest = %s\n", name, stream);
  
  return (0); 
}


/***  using gets() and sscanf() ***/
/*** NOTE: scanf(), sscanf(), and fscanf() all behave identically 

     scanf() gets input from standard input (keyboard)
    sscanf() gets input from a designated string
    fscanf() gets input from a designated external file

***/
#include <stdio.h>
#include <string.h>

int main(void)
{
  char stream[80], name[5];
  int temp;
  float test;

  printf("\nEnter a name integer and a float  ");
  gets(stream);
  sscanf(stream, "%s %d %f", name, &temp, &test);
  printf("\nstream = %s", stream);
  printf("\nname = %s int = %d float = %f\n", name, temp, test);

  return (0);
}