Question

(C++) Write a program whose input is two characters and a string, and whose output indicates the number of times each character appears in the string.

Ex: If the input is:

n M Monday

the output is:

1 1

Ex: If the input is:

z y Today is Monday

the output is:

0 2

Ex: If the input is:

n y It's a sunny day

the output is:

2 2 

Case matters.

Ex: If the input is:

n N Nobody

the output is:

0 1

n is different than N.

Answer 1

#include <iostream>
#include <string>

using namespace std;

int main() {
    char ch1, ch2;
    string str;
    int count1 = 0, count2 = 0, i;   // initialize counts to 0
    cin >> ch1 >> ch2;  // read two characters
    getline(cin, str);  // read rest of the line
    for (i = 0; i < str.size(); ++i) {  // go through all characters of line
        if (str[i] == ch1) { // if character is same as the first character entered
            ++count1;    // then increase count1 by 1
        }
        if (str[i] == ch2) { // if character is same as the second character entered
            ++count2;    // then increase count2 by 1
        }
    }
    cout << count1 << " " << count2 << endl;  // print counts
    return 0;
}