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C Program to Check if the Substring is present in the given String



C Program to Check if the Substring is present in the given String

 This C Program checks the substring is present in the given string. The program accepts both string and substring. Then checks whether the substring is present in the given string.

    #include<stdio.h>

    void main()

    {

        char str[100], search[10];

        int count1 = 0, count2 = 0, x, j, flag;

        printf("Enter a string:");

        gets(str);

        printf("Enter search substring:");

        gets(search);

        while (str[count1] != '?')

            count1++;

        while (search[count2] != '?')

            count2++;

        for (x = 0; x <= count1 - count2; x++)

        {

            for (j = x; j < x + count2; j++)

            {

                flag = 1;

                if (str[j] != search[j - x])

                {

                    flag = 0;

                    break;

                }

            }

            if (flag == 1)

                break;

        }

        if (flag == 1)

            printf("SEARCH SUCCESSFUL!");

        else

            printf("SEARCH UNSUCCESSFUL!");

    }

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