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C Program To Count the Occurence of a Substring in String

C Program To Count the Occurence of a Substring in String

This program takes a string and a substring as input and counts the occurrence of a substring in string.

- Take a string and a substring as input.
- Firstly check for the substring in the string.
- If it is present then count the number of times it is present.

    #include <stdio.h>

    #include <string.h>

    char str[80], sub[80];

    int count = 0, count1 = 0;

    void main()

    {

        int i, j, l, l1, l2;

        printf("\nEnter a string : ");

        scanf("%[^\n]s", str);

        l1 = strlen(str);

        printf("\nEnter a substring : ");

        scanf(" %[^\n]s", sub);

        l2 = strlen(sub);

        for (i = 0; i < l1;)

        {

            j = 0;

            count = 0;

            while ((str[i] == sub[j]))

            {

                count++;

                i++;

                j++;

            }

            if (count == l2)

            {

                count1++;                                   

                count = 0;

            }

            else

                i++;

        }    

        printf("%s occurs %d times in %s", sub, count1, str);

    }

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