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C program to split string by space into words

Problem statement

In this C program, we are going to learn how to split a given string by spaces and storing the substring in an array of strings.

Example

Input string: "Hello how are you?"

Output:
"Hello"
"how"
"are"
"you?"

C program to split string by space into words

/*C program to split string by space into words.*/

#include <stdio.h>
#include <string.h>

int main() {
  char str[100];
  char splitStrings[10][10];  // can store 10 words of 10 characters
  int i, j, cnt;

  printf("Enter a string: ");
  gets(str);

  j = 0;
  cnt = 0;
  for (i = 0; i <= (strlen(str)); i++) {
    // if space or NULL found, assign NULL into splitStrings[cnt]
    if (str[i] == ' ' || str[i] == '\0') {
      splitStrings[cnt][j] = '\0';
      cnt++;  // for next word
      j = 0;  // for next word, init index to 0
    } else {
      splitStrings[cnt][j] = str[i];
      j++;
    }
  }
  printf("\nOriginal String is: %s", str);
  printf("\nStrings (words) after split by space:\n");
  for (i = 0; i < cnt; i++) printf("%s\n", splitStrings[i]);

  return 0;
}

Output

Enter a string: Hello Guys This is a test string.

Original String is: Hello Guys This is a test string.
Strings (words) after split by space:
Hello
Guys
This
is
a
test
string.

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