C/String_print at master · sid050/C · GitHub

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


void findandreplace(char string[100],char pattern[20], char replace[20])

{

    char result[100];

    int stringindex,patternindex,resultindex,c=0,k,found=0;

    stringindex=patternindex=resultindex=0;

    while(string[c]!='\0')
    {

        if(string[stringindex]==pattern[patternindex])
        {
            stringindex++;
            patternindex++;

            if(pattern[patternindex]=='\0')
            {
                found++;

                for(k=0;replace[k]!='\0';k++,resultindex++)
                    result[resultindex]=replace[k];


                patternindex=0;
                c=stringindex;
            }

        }

        else
        {

            result[resultindex]=string[c];
            resultindex++;
            c++;
            stringindex=c;
            patternindex=0;

        }


    }

    result[resultindex]='\0';


    if(found>0)
    {
        printf("we found the pattern %d times\n",found);

    }
    else
    {

        printf("pattern is not found\n");

    }

    printf("resultant string\n");
    puts(result);


}

void main()

{

    char string[100],pattern[20],replace[20];

    printf("Enter the string ");
    gets(string);
    printf("Enter the pattern ");
    gets(pattern);
    printf("replace string\t");
    gets(replace);
    findandreplace(string,pattern,replace);


}