C Delete String 1 string 2

#include <stdio.h>
#include <string.h>
void Main ()
{
Char s1[1000],s2[100],b[100];
int i,j,k,len1,len2;
Gets (S1);
Gets (S2);
Len1=strlen (S1);
Len2=strlen (S2);
for (i=0,k=0;i<len1;i++)
{
for (j=0;j<len2;j++)
if (S1[i+j]!=s2[j]) break;
if (J&GT;=LEN2)
{
b[k]=i+1; B[k] is where S2 appears in S1
k++; K is the number of occurrences of S2 in S1
}
}
printf ("%d\n", K);
for (i=0;i<k;i++)
printf ("%d", b[i]);
printf ("\ n");


for (j=0;j<k;j++)//Remove S2 in S1
for (i=0;i<len2;i++)
s1[b[j]-1+i]= ' * ';
for (i=0;i<len1;i++)
if (s1[i]!= ' * ')
printf ("%c", S1[i]);
printf ("\ n");
}

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C Delete String 1 string 2