Parse string and swap substrings [closed] - c++

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How can I parse a string given by a user and swap all occurrences of the old substring with the new string. I have a function to work with but I am really uncertain when it comes to strings.
void spliceSwap( char* inputStr, const char* oldStr, const char* newStr )

Answer 1

The simplest solution is to use google (First link) here. Also be aware that in C++ we prefer std::string over const char *. Do not write your own std::string, use the built-in one. Your code seems to be more C than C++!

Answer 2

// Zammbi's variable names will help answer your question
// params find and replace cannot be NULL
void FindAndReplace( std::string& source, const char* find, const char* replace )
{
// ASSERT(find != NULL);
// ASSERT(replace != NULL);
size_t findLen = strlen(find);
size_t replaceLen = strlen(replace);
size_t pos = 0;
// search for the next occurrence of find within source
while ((pos = source.find(find, pos)) != std::string::npos)
{
// replace the found string with the replacement
source.replace( pos, findLen, replace );
// the next line keeps you from searching your replace string,
// so your could replace "hello" with "hello world"
// and not have it blow chunks.
pos += replaceLen;
}
}