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Cap_Phat_Dong_Them.cpp
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// Cap_Phat_Dong_Them.cpp #include <iostream> #include <stdlib.h> #include <string.h> using namespace std; void thayThe(char* str) { for (int i = 0; i < strlen(str); i++) { if (isupper(*(str+i))) { *(str+i) = tolower(*(str+i)); } else if (islower(*(str+i))) { *(str+i) = toupper(*(str+i)); } } } void demSoNguyen(char* str) { int so = 0; bool bat_dau = true; for (int i = 0; i < strlen(str); i++) { if (isdigit(str[i])) { if (bat_dau) { so++; bat_dau = false; } } else { bat_dau = true; } } cout<<"So so nguyen: "<<so<<endl; } int main() { char *str; str = (char*)malloc(80 * sizeof(char)); cout<<"Nhap chuoi: "; fflush(stdin); gets(str); str = (char*)realloc(str, strlen(str) * sizeof(char)); cout<<"Chuoi vua nhap: "<<endl; cout<<str<<endl; thayThe(str); cout<<"Chuoi sau khi thay the"<<endl; cout<<str<<endl; demSoNguyen(str); free(str); return 0; }