C Tutorial/Data Type/Integer Family
Содержание
Float family (real numbers with decimal points)
- Float data type
- Double data type
2.7.Integer Family 2.7.1. <A href="/Tutorial/C/0040__Data-Type/Integerfamily.htm">Integer family</a> 2.7.2. Float family (real numbers with decimal points) 2.7.3. <A href="/Tutorial/C/0040__Data-Type/Integerdatatypestorageallocations.htm">Integer data type storage allocations</a> 2.7.4. <A href="/Tutorial/C/0040__Data-Type/Usingtheintegerconversionspecifiers.htm">Using the integer conversion specifiers</a> 2.7.5. <A href="/Tutorial/C/0040__Data-Type/Printinganunsignedintegerinbits.htm">Printing an unsigned integer in bits</a>
Integer data type storage allocations
Data Type Allocation Range signed char 1 byte -2^7 to 2^7-1(-128 to 127) Unsigned char 1 byte 0 to 2^8-1(0 to 255) short 2 bytes -2^15 to 2^15 -1 (-32768 to 32767) Unsigned short 2 bytes 0 to 216 -1 (0 to 65535) long int 4 bytes 2^31 to 2^31-1 (2,147,483,648 to 2,147,483,647) int 2 or 4 bytes depending on implementation
Integer family
Integer data types are used for storing whole numbers and characters.
Integer family has
- char data type
- int data type
- short int data type
- long int data type
- They have the different amount of storage space.
- Each type has two variants, signed and unsigned.
2.7.Integer Family 2.7.1. Integer family 2.7.2. <A href="/Tutorial/C/0040__Data-Type/Floatfamilyrealnumberswithdecimalpoints.htm">Float family (real numbers with decimal points)</a> 2.7.3. <A href="/Tutorial/C/0040__Data-Type/Integerdatatypestorageallocations.htm">Integer data type storage allocations</a> 2.7.4. <A href="/Tutorial/C/0040__Data-Type/Usingtheintegerconversionspecifiers.htm">Using the integer conversion specifiers</a> 2.7.5. <A href="/Tutorial/C/0040__Data-Type/Printinganunsignedintegerinbits.htm">Printing an unsigned integer in bits</a>
Printing an unsigned integer in bits
#include <stdio.h>
int main() {
unsigned value = 7;
unsigned c;
unsigned displayMask = 1 << 31;
printf( "%10u = ", value );
for ( c = 1; c <= 32; c++ ) {
putchar( value & displayMask ? "1" : "0" );
value <<= 1;
if ( c % 8 == 0 ) {
putchar( " " );
}
}
return 0;
}7 = 00000000 00000000 00000000 00000111
Using the integer conversion specifiers
#include <stdio.h>
int main()
{
printf( "%d\n", 455 );
printf( "%i\n", 455 ); /* i same as d in printf */
printf( "%d\n", +455 );
printf( "%d\n", -455 );
printf( "%hd\n", 32000 );
printf( "%ld\n", 2000000000 );
printf( "%o\n", 455 );
printf( "%u\n", 455 );
printf( "%u\n", -455 );
printf( "%x\n", 455 );
printf( "%X\n", 455 );
return 0;
}455 455 455 -455 32000 2000000000 707 455 4294966841 1c7 1C7
