Delphi Programming Replace the character in the nth position, how does it work?

Send you a function:

def replacestring(string, num, replace):

string2 = ''

for i in range(len(string)):

if i == num:

string2 += replace

else:string2 += string[i]

return string2

Example: >>replacestring('abc', 1, 'a')

aac'

1. First enter **:

#include

#include

Parameters: originalstring: original string * key: string to be replaced.

swap: New string.

void replace(char originalstring, char key, char swap);

char key = ;

char swap = ;

replace(originalstring, key, swap);

printf("%s", originalstring);

return 0;

5. That's it.

#include

#include

#include

Replace t in strres with s, and return 1 if the replacement is successful, otherwise 0 is returned.

int strreplace(char strres,char from, char to) }

return flag;

int main()

The principle is the same. Find the keyword terms. You can use the strstr() library function.

Use strcpy to replace the function. But consider the length of the word to be replaced and the length of the word to be replaced. Do a good job of shifting other strings and allocating space for string length changes.

Upstairs explained the basics.

showmessage(stringreplace (astr, 'a', 'two', )//this is two book, not a pen!Only the first word that meets the requirements of the pass has been replaced.

showmessage(stringreplace (astr, 'a', 'two', [rfreplaceall]))//this is two book, not two pen!The compilation has been indicated, and I am d7 and tested it myself.

Delphi's stringreplace string substitution function.

function stringreplace (const s, oldpattern, newpattern: string; flags: treplaceflags):

string;

rfreplaceall: replaces all.

rfignorecase: Ignores case.

for example：

varastr: string;

beginastr := 'this is a book, not a pen!';

showmessage(stringreplace (astr, 'a', 'two', )//this is two book, not a pen!Only the first word that matches has been replaced.

showmessage(stringreplace (astr, 'a', 'two', [rfreplaceall]))//this is two book, not two pen!Replaced all words that matched.

astr := 'this is a book, not a pen!';

showmessage(stringreplace (astr, 'a', 'two', [rfreplaceall]))//this is two book, not a pen!Only the words that match (lowercase a) have been replaced

showmessage(stringreplace (astr, 'a', 'two', [rfreplaceall, rfignorecase]))//this is two book, not two pen!Regardless of case, all matching words are replaced.

end;

It is known that a library book is sorted alphabetically by the title of the book, forming n strings, and the idea of half-fold search is used to program to find the location of the specified string in n strings.

This is what I made, but the program always runs wrong. Pray for the great gods.

It is sent on the Kung Fu Embassy.

The materials that need to be prepared are: computer and C language compiler.

1. First of all, open the C language compiler and create a new initial. CPP file, for example:

2. In the file, enter C language**:

char a = "hello world!", b[20];

strrpl(a, b, sizeof(b), "world", "c");

puts(a);

3. The compiler runs the file, and at this time it will be successful"world"Replace with"c"The output was made.

It doesn't seem like there is, you can write one yourself.

#include

#include

main()

copy(‘2013314’,1,4)+'0'+copy(‘2013314’,5,3)

If you just choose a string in time format, you can do it another way:

formatdatetime('yyyymmdd',now);now is the current time. Replace with the time you want to display.