参考代码:
#include <iostream> #include <string> #include <cctype> using std::cin; using std::cout; using std::endl; using std::string; void differCharacter(const string& str); int main(void) { string str; getline(cin, str); //整行输入,包含空格 differCharacter(str); return 0; } void differCharacter(const string& str) { unsigned int alpha=0, digit=0, space=0, other=0; for (unsigned int i=0; i<str.length(); i++) { if ( isalpha(str.at(i)) ) { alpha++; } else if ( isdigit(str.at(i)) ) { digit++; } else if ( isspace(str.at(i)) ) { space++; } else { other++; } } cout << alpha << " " << digit << " " << space << " " << other << endl; }
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