Introduction To C++ Programming - Part 5.

C++ Program To Remove All Characters In A String Except Alphabet

#include<iostream>

#include<cstring>

using namespace std;

int main() {

char line[150];

int i,j;

cout << "Enter A String: ";

cin.getline(line, 150);

for(i=0; line[i]!='\0'; ++i) {

while (!((line[i]>='a'&&line[i]<='z')|| (line[i]>='A'&&line[i]<='Z'|| line[i]=='\0'))) {

for(j=i;line[j]!='\0';++j) {

line[j]=line[j+1];

}

line[j]='\0';

}}

cout << "\nOutput String: " << line;

return 0;

}

C++ Program To Find The Number Of Vowels, Consonants, Digits And White Spaces In A String

#include<iostream>

#include<cstring>

using namespace std;

int main() {

char line[150];

int i,v,c,ch,d,s,o;

o=v=c=ch=d=s=0;

cout<<"Enter A Sentence: ";

cin.getline(line, 150);

for(i=0;line[i]!='\0';++i) {

if(line[i]=='a' || line[i]=='e' || line[i]=='i'|| line[i]=='o' || line[i]=='u' || line[i]=='A'

|| line[i]=='E' || line[i]=='I' || line[i]=='O'|| line[i]=='U')

++v;

else if((line[i]>='a'&& line[i]<='z') || (line[i]>='A'&& line[i]<='Z'))

++c;

else if(line[i]>='0'&& line[i]<='9')

++d;

else if (line[i]==' ')

++s;

}

cout << "\nVowels: " << v;

cout << "\nConsonants: " << c;

cout << "\nDigits: " << d;

cout << "\nWhite spaces: " << s;

cout << "\n\n";

}

C++ Program To Find The Length Of A String

Method 1:

#include<iostream>

#include<cstring>

using namespace std;

int main() {

int i,length=0;

char str[1000]; // string length < 1000

cout <<"Enter A Sentence: ";

cin.getline(str, 1000);

for(i=0;str[i]!='\0';i++) {

length++;

}

cout <<"\nString Length: " << length << "\n";

return 0;

}

Method 2:

#include<iostream>

#include<cstring>

using namespace std;

int main() {

int length;

char str[1000];

cout <<"Enter A Sentence: ";

cin.getline(str, 1000);

length = strlen(str);

cout <<"\nString Length: " << length << "\n";

return 0;

}