CSI 250L Lab 2 Solution, Spring 2012

American University of Science & Technology Department Of Computer Science CSI 250L – Computer Programming-II Lab Fall 2011/2012 Lab Work 2 Solution provided by : Dr. Saeed Raheel Problem 4: Write a program to input a line of text and store it in an array Line. The program should allow the user to choose from the following menu: 1- Count the number of words in Line. 2- Output the length of Line. 3- Append “***” to Line. 4- Output the content of Line. 5- Exit. #include <iostream> using namespace std; int countWords(char a[]) { int count=0; for (int i=0;a[i]!='\0';i++) if (a[i]==' ') ++count; ++count; // to account for the last word in the line (usually it is not followed by a space but rather \0) return count; } int getLength(char a[]) { int i; for (i=0;a[i]!='\0';++i); return i; } void printArray(char a[]) { for (int i=0;a[i]!='\0';++i) cout << a[i]; } 1 void appendStars(char a[]) { int size = getLength(a); a[size]='*'; a[size+1]='*'; a[size+2]='*'; a[size+3]='\0'; } int main() { const int size = 80; char Line[size]; int action = 0; cout << "Please enter a line of text : "; cin.getline(Line, size); while (action!=5) { cout << "Please choose one of the following actions : " << endl; cout << "1- Count the number of words in Line." << endl; cout << "2- Output the length of Line." << endl; cout << "3- Append \"***\" to Line." << endl; cout << "4- Output the content of Line." << endl; cout << "5- Exit." << endl << endl; cin >> action; switch (action) { case 1: cout << "The number of words in \"" << Line << "\" : " << countWords(Line)<< endl;break; case 2:cout << "The length of \"" << Line << "\" : " << getLength(Line)<< endl;break; case 3:cout << "Appending \"***\" to \"" << Line << "\" : "; appendStars(Line); printArray(Line); cout << endl;break; case 4:cout << "The line of text is \""; printArray(Line); cout << "\"" << endl;break; // or simply cout << Line case 5:cout << "Exiting...Bye Bye" << endl;break; default : cout << "Invalid choice!" << endl; } cout << endl; } system("pause"); return 0; } 2