0
#include
#include
size_t count_char (const std::string& s, const char c)
{
size_t count = 0;
size_t offset = 0;
while ((offset = s.find(c, offset)) != s.npos)
{
++count;
++offset;
}
return count;
}
int main()
{
std::string str {"Hello world!"};
std::cout << "String: "" << str << """ << std::endl;
for (auto c : str )
{
size_t count = count_char (str, c);
std::cout << "'" << c << "' occurs " << count << " time" << (count==1?"":"s") << "." << std::endl;
}
}
Example output:
String: "Hello world!"
'H' occurs 1 time.
'e' occurs 1 time.
'l' occurs 3 times.
'l' occurs 3 times.
'o' occurs 2 times.
' ' occurs 1 time.
'w' occurs 1 time.
'o' occurs 2 times.
'r' occurs 1 time.
'l' occurs 3 times.
'd' occurs 1 time.
'!' occurs 1 time.
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