이 C++ 프로그램에서는 입력으로 텍스트와 패턴이 주어진다. 출력으로 텍스트에서 패턴이 검색되고 패턴의 모든 인스턴스가 제공됩니다.
알고리즘
Begin Take the string and pattern as input. Declare the original and duplicate array with their size. Put the lengths of original and duplicate in len_ori and len_dupli. Make a loop for find out the position of the searched pattern. If pattern is not found, print not found otherwise print the no of instances of the searched pattern. End
예시 코드
#include<iostream> #include<cstring> using namespace std; int main() { char ori[120], dupli[120]; int i, j, k = 0, len_ori, len_dupli; cout<<"enter string without any blank space"<<endl; cout<<"\nEnter Original String:"; cin>>ori; cout<<"Enter Pattern to Search:"; cin>>dupli; len_ori = strlen(ori); len_dupli = strlen(dupli); for (i = 0; i <= (len_ori - len_dupli); i++) // loop to find out the position Of searched pattern { for (j = 0; j < len_dupli; j++) { if (ori[i + j] != dupli[j]) break ; } if (j == len_dupli) { k++; cout<<"\nPattern Found at Position: "<<i; } } if (k == 0) cout<<"\nNo Match Found!"; else cout<<"\nTotal Instances Found = "<<k; return 0; }
출력
enter string without any blank space Enter Original String:Enter Pattern to Search: Pattern Found at Position: 0 Pattern Found at Position: 1 Pattern Found at Position: 2 Pattern Found at Position: 3 Total Instances Found = 4