Eliminació d'espais d'una cadena mitjançant Stringstream
La solució per eliminar espais d'una cadena ja està publicada aquí . En aquest article una altra solució utilitzant corrent de corda es discuteix.
Algorisme:
1. Enter the whole string into stringstream. 2. Empty the string. 3. Extract word by word and concatenate to the string.
Programa 1: Utilitzant EOF .
CPP // C++ program to remove spaces using stringstream #include using namespace std ; // Function to remove spaces string removeSpaces ( string str ) { stringstream ss ; string temp ; // Storing the whole string // into string stream ss < < str ; // Making the string empty str = '' ; // Running loop till end of stream while ( ! ss . eof ()) { // Extracting word by word from stream ss >> temp ; // Concatenating in the string to be // returned str = str + temp ; } return str ; } // Driver function int main () { // Sample Inputs string s = 'This is a test' ; cout < < removeSpaces ( s ) < < endl ; s = 'geeks for geeks' ; cout < < removeSpaces ( s ) < < endl ; s = 'geeks quiz is awesome!' ; cout < < removeSpaces ( s ) < < endl ; s = 'I love to code' ; cout < < removeSpaces ( s ) < < endl ; return 0 ; }
Sortida
Thisisatest geeksforgeeks geeksquizisawesome! Ilovetocode
Complexitat temporal: O(n) on n és la longitud de la corda
Espai auxiliar: O(n)
Programa 2: Utilitzant getline() .
CPP // C++ program to remove spaces using stringstream // and getline() #include using namespace std ; // Function to remove spaces string removeSpaces ( string str ) { // Storing the whole string // into string stream stringstream ss ( str ); string temp ; // Making the string empty str = '' ; // Running loop till end of stream // and getting every word while ( getline ( ss temp ' ' )) { // Concatenating in the string // to be returned str = str + temp ; } return str ; } // Driver function int main () { // Sample Inputs string s = 'This is a test' ; cout < < removeSpaces ( s ) < < endl ; s = 'geeks for geeks' ; cout < < removeSpaces ( s ) < < endl ; s = 'geeks quiz is awesome!' ; cout < < removeSpaces ( s ) < < endl ; s = 'I love to code' ; cout < < removeSpaces ( s ) < < endl ; return 0 ; } // Code contributed by saychakr13
Sortida
Thisisatest geeksforgeeks geeksquizisawesome! Ilovetocode
Complexitat temporal: O(n)
Espai auxiliar: O(n)
