Answered: Using C++ Built-in Functions in C++…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Using C++ Built-in Functions in C++

#include <iostream>

#include <string>

using namespace std;

int main()

{

const int LEN = 9;

char sample1[LEN];

char sample2[LEN];

char result1;

char result2;

int i;

cout << "Enter 9 lowercase characters: ";

for(i = 0; i < LEN; i++)

{

cin >> sample1[i];

result1=toupper(sample1[i]);

cout << result1 << endl;

}

cin.ignore(256,'\n');

cout << "Enter 9 uppercase characters: ";

for(i = 0; i < LEN; i++)

{

cin >> sample2[i];

result2=tolower(sample2[i]);

cout << result2 << endl;

}

cin.ignore(256,'\n');

return 0;

}
char tolower(char c) //function to convert uppercase to lowercase
{
return c+32;
}
char toupper(char c) //function to convert uppercase to uppercase
{
return c-32;
}

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