Question

How to count the letters, spaces, numbers and other characters of a string in C++

Answer 1

#include <iostream>

void count(char* s) {
    int letter = 0, spaces = 0, numbers = 0, otherchars = 0;
          
    for (int i = 0; s[i]; i++) {
        if (std::isalpha(s[i])) {
            letter++;
        }
        else if (std::isdigit(s[i])) {
            numbers++;
        }
        else if (std::isspace(s[i])) {
            spaces++;
        }
        else {
            otherchars++;
            }
    }
    std::cout << "letter: " << letter << "\n";
    std::cout << "space: " << spaces << "\n";
    std::cout << "number:  " << numbers << "\n";
    std::cout << "other: " << otherchars << "\n";
}
  
int main(void) {
    char s[] = "C++ Pro $%     Prog()ramming   17 !!!";
          
    count(s);
}
  
  
  
  
/*
run:
    
letter: 15
space: 11
number:  2
other: 9
    
*/

 

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