Deleting first occurrence of a pattern in a given string without using strstr() :C program

#include <stdio.h>

#include <string.h>

main()

{

char T[30],P[30];

int i,k,l2,count,flag=0,j;

printf("enter a string");

scanf("%s",T);

printf("enter a pattern");

scanf("%s",P);

l2=strlen(P);

for(i=0;T[i]!='\0';i++)

{

if(T[i]==P[0]) // true only when the first character in pattern is in T

{

count=1;

for(k=i+1,j=1;P[j]!='\0';k++,j++)  // checks if remaining characters in P are in T

{

if(T[k]==P[j])

count++;
    else
        break;

}

if(count == l2) //if all the characters in P are in T then count = length of the pattern

{

flag=1;

break;

}

}

}

if(flag==1)

{

printf("\nPattern is first occured at %d\n",i);

while(T[i+l2]!= '\0')

{

T[i]=T[i+l2];

i++;

}

T[i]='\0';

printf("String after removing pattern=  %s",T);

}

else

printf("Pattern is not present in the given string");

}

OUTPUT: