Count Number of Words in a String

Count Number of Words in a String” is a basic problem of string data structure. Here, we are given string containing some words and our task is to write a program to count the number of words present in the given string and print the count.

Example:

INPUT: 
Help Me Study Bro
OUTPUT:
4

INPUT:
Helpmestudybro is an emerging website.
OUTPUT:
5

The steps required to Count Number of Words in a String is as follows:

  1. Scan the complete string.
  2. While scanning, keep count of every blank spaces encountered.(Each word of the string will be separated by blank space, obviously).
  3. The result will the count + 1.

C++ Program to Count Number of Words in a String is as follows:

/* Program to Count Number of Words in a String */
#include<bits/stdc++.h>  
using namespace std;  
int main() 
{  
    string str;  
    cout<<"Enter a string:\n";  
    getline(cin,str);  
    int size = str.length();  
    int count = 0;  
    for(int i = 0; i < size; i++)  
    {  
        if(str[i] == ' ')  
        count++;  
    }  
    cout<<"Total number of words in the string are: "<<count+1;  
} 

OUTPUT:
Enter a string: 
HelpMeStudyBro is an emerging website
Total number of words in the string are: 5
Time Complexity:
O(n), where n is the length of the string

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