Question

How to check if a string is pangram in C++

Answer 1

// A string is a pangram if it contains all the characters of the alphabet ignoring case

#include <iostream>

bool isStringPangram(std::string str) {
    int letters[26] = { 0 };
    int size = str.length();

    for (int i = 0; i < size; i++) {
        if (isupper(str[i])) {
           letters[ str[i] - 'A' ]++;
        }
        else if (islower(str[i])) {
            letters[ str[i] - 'a' ]++;
        }
     }
 
    for (int i = 0; i < 26; i++) {
        if(letters[i] == 0)
            return false;
    }
    
    return true;
}

int main()
{
    std::string str = "The quick brown fox jumps over the lazy dog";
    
    if (isStringPangram(str) == true)
        std::cout << "string is a Pangram";
    else
        std::cout << "string is not a Pangram";

}




/*
run:

string is a Pangram

*/

 

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