String. find () function usage

1. The position of string s1 in s is returned. If no position is found,-1 is returned.

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Using namespace std; int main () {string s = "what are you dong"; string s1 = "are"; int position; position = s. find (s1); if (position =-1) cout <"not find" <
   
    
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Using namespace std; int main () {string s = "hahahahaha"; string s1 = "a"; int position; position = s. find_first_of (s1); cout <
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3. Search for string s1 starting from string s subscript a and return the starting position s. find (s1, a). If no result is found, return-1.
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             Using namespace std; int main () {string s = "have a good time"; string s1 = "good"; int position; position = s. find (s1, 3); cout <
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4. Search for all start positions of the character s1 in s
        
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Using namespace std; int main () {string s = "abb"; string s1 = "a"; // char s1 = 'a'; int position = 0; int I = 0; while (position = s. find_first_of (s1, position ))! = String: npos) {cout <
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Using namespace std; int main () {string s = "aaabcd"; string s1 = "aaafcd"; int position; position = s. find_first_not_of (s1); cout <
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6. reverse search: returns the position of s1 in s.
               
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Using namespace std; int main () {string s = "aaabcd"; string s1 = "abc"; int position; position = s. rfind (s1); cout <
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References:

                   
Http://www.jb51.net/article/37560.htm
                   

 
                   
 
                   
 
                   

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