Create count-word-in-sentence.cpp

count-word-in-sentence.cpp

@@ -0,0 +1,47 @@
+/* C++ program to count no of words
+from given input string. */
+#include <bits/stdc++.h>
+using namespace std;
+
+#define OUT 0
+#define IN 1
+
+// returns number of words in str
+unsigned countWords(char *str)
+{
+	int state = OUT;
+	unsigned wc = 0; // word count
+
+	// Scan all characters one by one
+	while (*str)
+	{
+		// If next character is a separator, set the
+		// state as OUT
+		if (*str == ' ' || *str == '\n' || *str == '\t')
+			state = OUT;
+
+		// If next character is not a word separator and
+		// state is OUT, then set the state as IN and
+		// increment word count
+		else if (state == OUT)
+		{
+			state = IN;
+			++wc;
+		}
+
+		// Move to next character
+		++str;
+	}
+
+	return wc;
+}
+
+// Driver code
+int main(void)
+{
+	char str[] = "One two	 three\n four\tfive ";
+	cout<<"No of words : "<<countWords(str);
+	return 0;
+}
+
+// This is code is contributed by rathbhupendra