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Dem_Xau.cpp
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// Dem_Xau.cpp #include <iostream> #include <string.h> using namespace std; void nhap(char s[100]) { do { cout<<"Nhap vao chuoi s: "; fflush(stdin); gets(s); } while (!strcmp(s, "")); } void dem(char s[100]) { int chuhoa, chuthuong, chuso, i; chuhoa = chuthuong = chuso = i = 0; while (s[i] != '\0') { if (isupper(s[i])) chuhoa++; if (islower(s[i])) chuthuong++; if (isdigit(s[i])) chuso++; i++; } cout<<"Co "<<chuhoa<<" chu hoa"<<endl; cout<<"Co "<<chuthuong<<" chu thuong"<<endl; cout<<"Co "<<chuso<<" chu so"<<endl; } int main() { char s[100]; nhap(s); dem(s); return 0; }