if statement - Having troulbe grasping simple boolean loop if/else program in C++ -

i need little figuring out couple of parts c++ assignment. asked write program follows:

write program accepts input keyboard (with input terminated pressing enter key) , counts number of letters (a-z , a-z), numerical digits (0-9), , other characters. input string using cin , use following looping structure examine each character in string "if" statement , multiple "else if" statements.

char s[50]; int i;  . . .  = 0; while (s[i] != 0) { // string terminated null (0) value  . . .  i++; } 

your program should make use of relational operators (e.g., == < > <= >= !=) determine whether particular character letter, number, or other character. may #include , may not use other include files.

the program should have output similar following:

enter continuous string of characters no blank spaces (example: abc1234!@#$%)

enter string: abc1234!@#$%

your string has 12 total characters 3 letters 4 numerical characters 5 other characters 

here example program counts lower case letters:

// prog07.cpp example  #include <iostream> using namespace std;   int main() { char s[50]; int i; int lowercase = 0;  //get string user cout << "enter continuous string of characters no blanspaces\n" cout << "(example: abc1234!@#$%)" << endl << endl; cout << "enter string: "; cin >> s; cout << endl;  // loop through string, lower case letters // note, strings (character arrays) have invisible // 0 value @ end = 0; while (s[i] != 0) // while character not have ascii code 0 { if ((s[i] >= 'a' && s[i] <= 'z')) lowercase++; i++; }  cout << "your string has " << lowercase << " lower case letters" << endl;  // including next line dev-c++: system("pause"); // not needed codeblocks  return 0; } 

so far, have come this:

#include <iostream> using namespace std;  int main() { char s[50]; int i; int lowercase, uppercase, numchars, otherchars = 0;  cout << "enter continuous string of characters" << endl; cout << "(example: abc1234!@#$%)" << endl; cout << "enter string: "; cin >> s; cout << endl;  while (s[i] != 0) // while character not have ascii code 0 { if ((s[i] >= 'a' && s[i] <= 'z'))     lowercase++;     i++; } while (s[i] != 0) { if ((s[i] >= 'a' && s[i] <= 'z'))     uppercase++;     i++; } cout << lowercase + uppercase << " letters" << endl; = 0; while (s[i] != 0) { if ((s[i] >= '0' && s[i] <= '9'))     numchars++;     i++; }  cout << numchars << " numerical characters" << endl;  return 0; } 

any appreciated.

you have reset 0 before every loop:

#include <iostream> using namespace std;  int main() { char s[50]; int i; int lowercase, uppercase, numchars, otherchars = 0;  cout << "enter continuous string of characters" << endl; cout << "(example: abc1234!@#$%)" << endl; cout << "enter string: "; cin >> s; cout << endl;  = 0; //missing while (s[i] != 0) // while character not have ascii code 0 { if ((s[i] >= 'a' && s[i] <= 'z'))     lowercase++;     i++; } = 0; // missing while (s[i] != 0) { if ((s[i] >= 'a' && s[i] <= 'z'))     uppercase++;     i++; } cout << lowercase + uppercase << " letters" << endl; = 0; while (s[i] != 0) { if ((s[i] >= '0' && s[i] <= '9'))     numchars++;     i++; }  cout << numchars << " numerical characters" << endl;  return 0; }