scanf()

Converts formatted text from stdin to binary data.

  #include <stdio.h>
  
  int scanf(const char *format, ...);    

format

The format string.

The scanf() function reads text and converts the text read to programmer specified types.

scanf() returns the number of items successfully read and returns EOF if a conversion type does not match its argument or and end-of-file is reached.

This facility may not be available on configurations of the EWL that run on platforms without file systems.

#include <stdio.h>

int main(void)

{

int i;

unsigned int j;

char c;

char s[40];

double x;

printf("Enter an integer surrounded by ! marks\n");

scanf("!%d!", &i);

printf("Enter three integers\n");

printf("in hexadecimal, octal, or decimal.\n");

// Note that 3 integers are read, but only the last two

// are assigned to i and j.

scanf("%*i %i %ui", &i, &j);

printf("Enter a character and a character string.\n");

scanf("%c %10s", &c, s);

printf("Enter a floating point value.\n");

scanf("%lf", &x);

return 0;

}

Output:

Enter an integer surrounded by ! marks

!94!

Enter three integers

in hexadecimal, octal, or decimal.

1A 6 24

Enter a character and a character string.

Enter a floating point value.

A

Sounds like 'works'!

3.4

#include <stdio.h>

int main(void)

{

vector signed char v8, vs8;

vector unsigned short v16;

vector signed long v32;

vector float vf32;

sscanf("1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16", "%vd", &v8);

sscanf("1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16", "%,vd", &vs8);

sscanf("abcdefgh", "%vhc", &v16);

sscanf("1, 4, 300, 400", "%,3lvd", &v32);

sscanf("1.10, 2.22, 3.333, 4.4444", "%,5vf", &vf32);

return 0;

}

The Result is:

v8 = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16;

vs8 = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16;

v16 = 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'

v32 = 1, 4, 300, 400

vf32 = 1.1000, 2.2200, 3.3330, 4.4444