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string类使用的例子(2)
console.write("enter the string array length : ");
string strarr=console.readline();
int intarr=int.parse(strarr);
for (int i=0;i<intarr;i++) {
console.write("enter string " + i + " : ");
strtemparr[i]=console.readline();
}
console.writeline("the concatenated string : " + string.concat(strtemparr));
console.writeline("the concatenation of the first two string : " + string.concat(strtemparr[0],strtemparr[1]));
console.writeline("the concatenation of the first three string : " + string.concat(strtemparr[0],strtemparr[1],strtemparr[2]));
console.writeline("the concatenation of the first four string : " + string.concat(strtemparr[0],strtemparr[1],strtemparr[2],strtemparr[3]));
}
private void mtdcopy() {
console.writeline("string.copy(string str) - > returns a new string with the same value as 'str'");
console.writeline("original string : " + objstring.str);
console.write("enter the string to replace the above one : ");
string strcopy=console.readline();
objstring.str=string.copy(strcopy);
console.writeline("the string after copying : " + objstring.str);
}
private void mtdcopyto() {
console.writeline("string.copyto(int srcindex,char[] dest,int destindex,int intcount) - > copies a part of string to another string");
console.writeline("srcindex -> the start index in the original string from where u want the copy");
console.writeline("dest -> the destination chracter array");
console.writeline("destindex -> the start index in the destination array to which the characters should be copied");
console.writeline("dest -> the length of characters in the original string to be copied");
console.writeline("destination string is : " + objstring.str);
console.write("enter the source string : ");
string strtmp=console.readline();
console.write("enter the starting index for source string : ");
string strsrcst=console.readline();
int intsrcst=int.parse(strsrcst);
console.write("enter the starting index in the destination string : ");
string strdstst=console.readline();
int intdstst=int.parse(strdstst);
console.write("enter the number of characters to be copied from the source string : ");
string strsrcln=console.readline();
int intsrcln=int.parse(strsrcln);
charray=objstring.str.tochararray();
strtmp.copyto(intsrcst,charray,intdstst,intsrcln);
objstring.str=new string(charray);
console.writeline("the changed string is : " + objstring.str);
}
private void mtdendswith() {
console.writeline("string.endswith(string str) - > this function returns a boolen value, checking whether the parent string ends with 'str'");
console.writeline("the string to be checked :" + objstring.str);
console.write("enter the 'ends with' string :");
string strtmp = console.readline();
if (objstring.str.endswith(strtmp))
console.writeline("'"+ objstring.str + "' ends with '" + strtmp + "'.");
else
console.writeline("'" + objstring.str + "' does not end with '" + strtmp + "'.");
}
private void mtdformat() {
console.writeline("string.format() - > this static function helps in formating the strings");
console.writeline("format(string str,object obj) -> format the string with one object");
console.writeline("format(string str,object obj1,object obj2) -> format the string with two objects");
console.writeline("formating the string with three objects is another implementation.");
console.writeline("the string should follow the formating specification - > {n,[m]:[formatstring]}");
console.writeline("n -> indicates the argument to be replaced. starts from zero(0)");
console.writeline("m -> indicates the length of formatting area,padded with spaces if the value filled in is smaller.");
console.writeline("if the value is -ve then value is left justified, if value is +ve then value is right justified.");
console.writeline("formatstring -> these are values of formating codes (eg : 'c' is used for currency)");
string strtmp="it is {0} working in {1,10} bcos i get {2,5:c} per month.it is not {0} working {1,-10} bcos i get only {2,-5:c}";
console.writeline("the source string is : " + strtmp);
console.write("enter the first replacement string : ");
string strtmp1=console.readline();
console.write("enter the second replacement string : ");
string strtmp2=console.readline();
console.write("enter a numeral : ");
string strtmp3=console.readline();
int inttmp=int.parse(strtmp3);
console.writeline("the modified string :" + string.format(strtmp,strtmp1,strtmp2,inttmp));
}
private void mtdhash() {
console.writeline("string.gethashcode() - > this fuctions returns the hash code of the string");
console.writeline("hash of '"+ objstring.str + "' is : " + objstring.str.gethashcode());
}
private void mtdindexof() {
console.writeline("string.indexof() - > this returns the index of the first occurence of a charcter or string in the given string.");
console.writeline("the search of the string stops when the required value is founds or proceedes until the end of the string has been reached");
console.writeline("it returns the index if the value is found or '-1' if not found.");
mtdindeximpl("index","first");
}
private void mtdindeximpl(string strvalue,string strfl) {
string strchar;
char c;
int intstart;
int intcount;
console.writeline("1. string."+strvalue+"of(char c) -> returns the "+strfl+" occurence 'c' in the string");
console.writeline("2. string."+strvalue+"of(string str) -> returns the "+strfl+" occurence of 'str' in the string");
console.writeline("3. string."+strvalue+"of(char c,int i) -> returns the "+strfl+" occurence of 'c' in the string, the search starts from 'i'");
console.writeline("4. string."+strvalue+"of(string str,int i) -> returns the "+strfl+" occurence of 'str' in the string, the search starts from 'i'");
console.writeline("5. string."+strvalue+"of(char c,int i,int j) -> returns the "+strfl+" occurence of 'c' in the string, the search starting from 'i' and examining 'j' character positions.");
console.writeline("6. string."+strvalue+"of(string str,int i,int j) -> returns the "+strfl+" occurence of 'str' in the string, the search starting from 'i' and examining 'j' character positions.");
console.writeline("7. finished with "+strvalue+"of.");
console.write("give the choice :");
string strtmp=console.readline();
int intchoice=int.parse(strtmp);
bool blnstay=true;
console.writeline("the source string is :"+objstring.str);
switch (intchoice) {
case 1:
console.write("enter the character :");
strchar=console.readline();
c=(strchar.tochararray())[0];
if ("first"==strfl)
console.writeline("the index of '"+c+"' in '"+objstring.str+"' is : "+objstring.str.indexof(c));
else
console.writeline("the index of '"+c+"' in '"+objstring.str+"' is : "+objstring.str.lastindexof(c));
break;
case 2:
console.write("enter the string :");
strchar=console.readline();
if ("first"==strfl)
console.writeline("the index of '"+strchar+"' in '"+objstring.str+"' is : "+objstring.str.indexof(strchar));
else
console.writeline("the index of '"+strchar+"' in '"+objstring.str+"' is : "+objstring.str.lastindexof(strchar));
break;
case 3:
console.write("enter the character :");
strchar=console.readline();
c=(strchar.tochararray())[0];
console.write("enter the starting index :");
intstart=int.parse(console.readline());
if ("first"==strfl)
console.writeline("the index of '"+c+"' in '"+objstring.str+"' is : "+objstring.str.indexof(c,intstart));
else
console.writeline("the index of '"+c+"' in '"+objstring.str+"' is : "+objstring.str.lastindexof(c,intstart));
break;
case 4:
console.write("enter the string :");
strchar=console.readline();
console.write("enter the starting index :");
intstart=int.parse(console.readline());
if ("first"==strfl)
console.writeline("the index of '"+strchar+"' in '"+objstring.str+"' is : "+objstring.str.indexof(strchar,intstart));
else
console.writeline("the index of '"+strchar+"' in '"+objstring.str+"' is : "+objstring.str.lastindexof(strchar,intstart));
break;
case 5:
console.write("enter the character :");
strchar=console.readline();
c=(strchar.tochararray())[0];
console.write("enter the starting index :");
intstart=int.parse(console.readline());
console.write("enter the number of characters to search : ");
intcount=int.parse(console.readline());
if ("first"==strfl)
console.writeline("the index of '"+c+"' in '"+objstring.str+"' is : "+objstring.str.indexof(c,intstart,intcount));
else
console.writeline("the index of '"+c+"' in '"+objstring.str+"' is : "+objstring.str.lastindexof(c,intstart,intcount));
break;
case 6:
console.write("enter the character :");
strchar=console.readline();
console.write("enter the starting index :");
intstart=int.parse(console.readline());
console.write("enter the number of characters to search : ");
intcount=int.parse(console.readline());
if ("first"==strfl)
console.writeline("the index of '"+strchar+"' in '"+objstring.str+"' is : "+objstring.str.indexof(strchar,intstart,intcount));
else
console.writeline("the index of '"+strchar+"' in '"+objstring.str+"' is : "+objstring.str.lastindexof(strchar,intstart,intcount));
break;
case 7:
blnstay=false;
break;
}
if (blnstay)
mtdindeximpl(strvalue,strfl);
}
private void mtdindexofany() {
console.writeline("string.indexofany() - > this returns the index of the first occurence of any charcter of the character array in the given string.");
console.writeline("the search of the string stops when the required value is founds or proceedes until the end of the string has been reached");
console.writeline("it returns the index if the value is found or '-1' if not found.");
mtdindexanyimpl("index","first");
}
private void mtdindexanyimpl(string strvalue,string strfl) {
string strchar;
char[] c=new char[char.maxvalue];
int intstart;
int intcount;
console.writeline("1. string."+strvalue+"ofany(char[] c) -> returns the "+strfl+" occurence of any character of the array in the string");
console.writeline("2. string."+strvalue+"ofany(char[] c,int i) -> returns the "+strfl+" occurence of any character of the array in the string, the search starts from 'i'");
console.writeline("3. string."+strvalue+"of(char[] c,int i,int j) -> returns the "+strfl+" occurence of any character of the array in the string, the search starting from 'i' and examining 'j' character positions.");
console.writeline("4. finished with "+strvalue+"ofany.");
console.write("give the choice :");
string strtmp=console.readline();
int intchoice=int.parse(strtmp);
bool blnstay=true;
console.writeline("the source string is : "+objstring.str );
switch (intchoice) {
case 1:
console.write("enter the string for the character array :");
strchar=console.readline();
c=strchar.tochararray();
if ("first"==strfl)
console.writeline("the index value returned is : "+ objstring.str.indexofany(c));
else
console.writeline("the index value returned is : "+ objstring.str.lastindexofany(c));
break;
case 2:
console.write("enter the string for the character array :");
strchar=console.readline();
c=strchar.tochararray();
console.write("enter the starting index for search :");
intstart=int.parse(console.readline());
