C++ examples for Data Type:char array
Create a case-insensitive string comparison function
#include <iostream> #include <cctype> using namespace std; int strcmp_ign_case(const char *str1, const char *str2); void showresult(const char *str1, const char *str2, int result); int main() {/* www .ja va 2s. c om*/ char strA[]= "tesT"; char strB[] = "Test"; char strC[] = "testing"; char strD[] = "Tea"; int result; cout << "Here are the strings: " << endl; cout << "strA: " << strA << endl; cout << "strB: " << strB << endl; cout << "strC: " << strC << endl; cout << "strD: " << strD << "\n\n"; // Compare strings ignoring case. result = strcmp_ign_case(strA, strB); showresult(strA, strB, result); result = strcmp_ign_case(strA, strC); showresult(strA, strC, result); result = strcmp_ign_case(strA, strD); showresult(strA, strD, result); result = strcmp_ign_case(strD, strA); showresult(strD, strA, result); return 0; } // A simple string comparison function that ignores case differences. int strcmp_ign_case(const char *str1, const char *str2) { while(*str1 && *str2) { if(tolower(*str1) != tolower(*str2)) break; ++str1; ++str2; } return tolower(*str1) - tolower(*str2); } void showresult(const char *str1, const char *str2, int result) { cout << str1 << " is "; if(!result) cout << "equal to "; else if(result < 0) cout << "less than "; else cout << "greater than "; cout << str2 << endl; }