Basic data type length for C language

PS: The following is a test result in the 64-bit environment of Xcode's editor, online search for the differences between the 64-bit and 32-bit data types.

Main.m

1 #import<Foundation/Foundation.h>2 voidBasicdatatypeinc () {3Nsmutablestring *mstrinfo =[[Nsmutablestring alloc] init];4     //(Numeric Type-"integer") integer type 2147483648 to 21474836475     intIntegerval =888;6     //(Numeric Type-"integer") short integer type7      Short intShortintegerval =888;8     //(Numeric Type-"integer") long integer type9     Long intLongintegerval =888;Ten      One     //(numeric Type-"float type") single-precision type, where there is a loss of precision (as follows: Because of the single-precision type, the number of significant digits is 6-7 bits.) And the integer is 3 bits, so the decimal 3 or 4 digits are not valid numbers) A     floatFloatval =888.8888888888; -     //(numeric Type-"floating point") double type (as follows: Because it is a double type, the number of significant digits is 15-16 bits.) VC6.0, however, retains a maximum of 6 digits after the decimal, rounding out the remainder) -     DoubleDoubleval =888.8888888888; the      -      -     //Character Type -     CharCharval ='a'; +     CharCharVal2 = the; -     //the type of the string, essentially using the pointer type +     Char*charval3 ="I am a string."; A      at     //Boolean, not 0 and false, which means 1 is true -     BOOLBoolval =true; -     BOOLBoolVal2 =-1; -     BOOLBoolVal3 =1; -     BOOLBoolVal4 =2; -[Mstrinfo AppendFormat:@"\nintegerval=%i\n", Integerval];//integerval=888 in[Mstrinfo AppendFormat:@"shortintegerval=%hi\n", Shortintegerval];//shortintegerval=888 -[Mstrinfo AppendFormat:@"longintegerval=%li\n", Longintegerval];//longintegerval=888 to[Mstrinfo AppendFormat:@"floatval=%f\n", Floatval];//floatval=888.888916 +[Mstrinfo AppendFormat:@"doubleval=%f\n", Doubleval];//doubleval=888.888889 -[Mstrinfo AppendFormat:@"charval=%c\n", Charval];//Charval=a the[Mstrinfo AppendFormat:@"charval2=%c\n", CharVal2];//Charval2=a *[Mstrinfo AppendFormat:@"charval3=%s\n", CharVal3];//charval3=i am a string. $[Mstrinfo AppendFormat:@"boolval=%i\n", Boolval];//boolval=1Panax Notoginseng[Mstrinfo AppendFormat:@"boolval2=%i\n", BoolVal2];//boolval2=1 -[Mstrinfo AppendFormat:@"boolval3=%i\n", BoolVal3];//boolval3=1 the[Mstrinfo AppendFormat:@"boolval4=%i\n\n\n", BoolVal4];//boolval4=1 +      A      the[Mstrinfo AppendFormat:@"sizeof (int) is%lu bytes \ n",sizeof(int)];//sizeof (int) is 4 bytes +[Mstrinfo AppendFormat:@"sizeof (short int) is%lu bytes \ n",sizeof( Short int)];//sizeof (short int) is 2 bytes -[Mstrinfo AppendFormat:@"sizeof (long int) is%lu bytes \ n",sizeof(Long int)];//sizeof (long int) is 8 bytes $[Mstrinfo AppendFormat:@"sizeof (float) is%lu bytes \ n",sizeof(float)];//sizeof (float) is 4 bytes $[Mstrinfo AppendFormat:@"sizeof (double) is%lu bytes \ n",sizeof(Double)];//sizeof (double) is 8 bytes -[Mstrinfo AppendFormat:@"sizeof (char) is%lu bytes \ n",sizeof(Char)];//sizeof (char) is 1 bytes -[Mstrinfo AppendFormat:@"sizeof (BOOL) is a%lu byte",sizeof(BOOL)];//sizeof (bool) is 1 bytes theNSLog (@"%@", mstrinfo); - }Wuyi intMainintargcConst Char*argv[]) { the @autoreleasepool { -NSLog (@"basic data type length for C language"); Wu basicdatatypeinc (); -     } About     return 0; $}

Results:

1  -- to- the  at: on:06.687cbasicdatatype[917:36520] The basic data type length of the C language2  -- to- the  at: on:06.688cbasicdatatype[917:36520] 3Integerval=8884Shortintegerval=8885Longintegerval=8886Floatval=888.8889167Doubleval=888.8888898Charval=a9Charval2=aTenCharval3=i am Astring. OneBoolval=1 ABoolval2=1 -boolval3=1 -boolval4=1 the sizeof(int) is 4 bytes - sizeof( Short int) is 2 bytes - sizeof(Long int) is 8 bytes - sizeof(float) is 4 bytes + sizeof(Double) is 8 bytes - sizeof(Char) is 1 bytes + sizeof(BOOL) is 1 bytes

Basic data type length for C language