chetmat

#include <iostream>
#include <string.h>
using namespace std;
#define MAX 300

void DemTieng(char s1[]);
int myStrcmp(char s1[], char s2[]);
int myStrlen(char s[], int k);
void myStrcpy(char s[], int vt, char s1[], int k);
void myMemmove(char s[], int vt, int k);
int myStrstr(char s[], char s1[]);
void mySubstr(char s[], int b, int count, char ss[]);
bool myStrcat(char s1[], char s2[]);

int main()
{
	char s[MAX];
	fgets(s,300,stdin);
	if (myStrcmp(s, "") == 0)
		cout << "Chuoi rong." << endl;
	else
		DemTieng(s);
	return 0;
}

//Dem so ki tu trong mang
int myStrlen(char s[], int k) {
	int cnt = 0;

	for (int i = k; s[i] != '\0'; i++) cnt++;

	return cnt;
}

//so sanh s1 va s2, giong nhau -> 0, khac nhau -> 1
int myStrcmp(char s1[], char s2[]) {

	if (myStrlen(s1, 0) == myStrlen(s2, 0)) {

		for (int i = 0; i < myStrlen(s1, 0); i++) {
			if (s1[i] != s2[i]) return 1;
		}
	} 
	else return 1;

	return 0;
}

//copy chuoi s1 sang s. Copy tu vi tri vt, copy k ky tu
void myStrcpy(char s[], int vt, char s1[], int k) {
	int cnt = 0;

	for (int i = vt; i < vt + k; i++) {
		s[cnt] = s1[i];
		cnt++;
	}

	s[cnt] = '\0';
}

//dem tieng

char a[MAX][MAX];

int c[MAX]; //mang danh dau

void DemTieng(char s1[]) {
	int cntA = 0;

	for (int i = 0; s1[i] != '\0'; i++) {
		char temp[MAX] = "";

		while (s1[i] != ' ') {
			int j = 0;

			temp[j] = s1[i];

			j++; i++;
		}

		myStrcpy(a[cntA], 0, temp, myStrlen(temp, 0));

		cntA++;
	}

	for (int i = 0; i < cntA - 1; i++) {
		for (int j = 0; j < cntA; j++) {
			if (myStrcmp(a[i], a[j]) == 0) {
				c[i]++;

				myStrcpy(a[j], 0, "null", 4);
			}
		}
	}

	for (int i = 0; i < cntA; i++) {
		if (myStrcmp(a[i], "null") == 1) {
			cout << a[i] << ": " << c[i] << endl;
		}
	}
}