A pangram sentence is a sentence that contains every letter of the alphabet at least once. The most famous pangram is probably the thirty-five-letter-long “The quick brown fox jumps over the lazy dog”...

A pangram sentence is a sentence that contains every letter of the alphabet at least once. The most famous pangram is probably the thirty-five-letter-long “The quick brown fox jumps over the lazy dog” which has been used to test typing equipment since at least the late 1800s. Write a C++ program that will input a sentence from the user then display whether this sentence is a pangram or not.