10 Types of small questions

//

Main.m

Examination questions

//

Created by Zhong Jia Bo Zhong Group on 15/11/16.

Copyright (c) 2015 Com.sisp. All rights reserved.

//

#import <Foundation/Foundation.h>

#define NSLOG (FORMAT, ...) printf ("%s\n", [[NSString Stringwithformat:format, # #__VA_ARGS__] utf8string])

int main (int argc, const char * argv[]) {

@autoreleasepool {

/*

The world in the 1th string is replaced by the I Bookan wisdom

NSString *[email protected] "Hello World and Sunshine";

Open space for variable strings

Nsmutablestring *mustr=[[nsmutablestring Alloc]init];

To assign an immutable string to a mutable string

Mustr=[nsmutablestring STRINGWITHSTRING:STR1];

Replace

Nsrange rang=[mustr rangeofstring:@ "World"];

[Mustr Replacecharactersinrange:rang withstring:@ "I Bookan wisdom"];

NSLog (@ "%@", mustr);

*/

/*

The 2nd string is summed, output as a string, and the output length

NSString *[email protected] "999";

NSString *[email Protected] "888";

Connection string

NSString *newstr=[[nsstring alloc]initwithformat:@ "%@%@", STR2,STR3];

NSLog (@ "%@", newstr);

Calculating string Lengths

Nsuinteger len = [newstr length];

NSLog (@ "%ld", Len);

*/

/*

Question 3rd Comparing string sizes

NSString *[email protected] "ABC";

NSString *[email protected] "ABc";

Comparison of two string sizes

Nscomparisonresult result= [STR4 COMPARE:STR5];

Judging condition nsorderedascending represents a small size before ascending

if (result==nsorderedascending) {

NSLog (@ "STR4<STR5");

Nsordereddescending represents descending before large after small

}else if (result==nsordereddescending) {

NSLog (@ "STR4>STR5");

}else{

NSLog (@ "STR4=STR5");

}

*/

/*

The 4th question intercepts Android and outputs

NSString *[email protected] "iphoneandroid";

All characters starting at the specified position (and including the specified position) start at 0

NSString *NEWSTR2=[STR6 Substringfromindex:6];

NSLog (@ "%@", NEWSTR2);

*/

/*

Question 5th creates an OC string in C and outputs it. Two methods are used.

C Language String

Char *s= "Zhangsanfeng";

int a=9;

printf ("%s", s);

Convert to OC string

NSString *str = [NSString stringwithformat:@ "%d", a];

NSLog (@ "%@", str);

OC string to C language string

NSString *[email protected] "Yangyang";

Convert OC to String

const char *strstring=[string utf8string];

NSLog (@ "%s", strstring);

*/

/*

All a in the 6th string is replaced by A;

NSString *[email protected] "whatareyou";

NSString *NEWSTR=[STR7 stringbyreplacingoccurrencesofstring:@ "A" withstring:@ "a"];

NSLog (@ "%@", newstr);

*/

/*

Question 7th determine if the string starts with HTTP

NSString *[email protected] "http://www.sina.com.cn";

BOOL result = [str8 hasprefix:@ "http"];

if (result==1) {

NSLog (@ "starts with http");

}else{

NSLog (@ "not beginning with http");

}

*/

/*

The 8th question is to intercept the string within admin and 123.

NSString *[email protected] "http://localhost:8099/test/user=admin&pwd=123";

Nsrange rang;

Nsrange rang1;

rang.location=32;

rang.length=5;

rang1.location=42;

rang1.length=3;

NSString *NEWSTR3=[STR9 Substringwithrange:rang];

NSString *NEWSTR4=[STR9 Substringwithrange:rang1];

NSLog (@ "%@", NEWSTR3);

NSLog (@ "%@", NEWSTR4);

*/

/*

The 9th inscription added Telephone:iphone iphone5 modified to "Telephone:iphone iphone4 iphone5 iphone6";

NSString *[email protected] "Telephone:iphone iphone5";

Assign a variable string to an immutable string, assign a value

Nsmutablestring *mustr=[[nsmutablestring Alloc]init];

Mustr=[nsmutablestring Stringwithstring:str10];

Inserting a string in a fixed position

[Mustr insertstring:@ "iphone4" atindex:17];

Inserts a string at the end

[Mustr appendstring:@ "Iphone6"];

NSLog (@ "%@", mustr);

*/

/*

Sort 10th question

*/

Nsarray *[email protected][@ "string One", @ "string", @ "string 1", @ "String 2", @ "string 02";

Nsarray *sortarr=[arr sortedarrayusingselector: @selector (compare:)];

for (id str in sortarr) {

NSLog (@ "%@", str);

}

}

return 0;

}

10 Types of small questions