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Question: How do I write a user-defined function, which deletes each character in a string str1, which matches any character in string str2?

Answer: The function is as shown below:

Compress ( char str1[], char str2[] )
{
int i, j, k ;

for ( i = k = 0 ; str1[i] != â??â?? ; i++ )
{
for ( j = 0 ; str2[j] != â??â?? && str2[j] !=
str1[i] ; j++ )
;
if ( str2[j] == â??â?? )
str1[k++] = str1[I] ;
}
str1[k] = â??â??
}
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