zap

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>

int count_zeros();
int count_vowels();
int max();
int index();
int largest();
void swap();

int main(){

	////////////////////////////////////////////COUNT ZEROS
	int array[4][4] = { {1, 0, -10, 0},
	       		    {0,-3, 0, 8},
       			    {0,0,69,420},
			    {5,0,1,0}
			};
	printf("ZEROS = %d\n",count_zeros(4,array));

	/////////////////////////////////////////////COUNT VOWELS
	char strings[3][50] = {"hello WORLD!", "aHOJú", "Ahoj"};
	printf("VOWELS = %d\n", count_vowels(3,50,strings));

	////////////////////////////////////////////MAX
	int array2[4][4] = { {1,5,9,250},
				{-5,-95,124,0},
				{7,8,666,0},
				{2254,-665,14,3},
				};
	printf("MAX NUMBER = %d\n", max(4,array2));

	///////////////////////////////////////LONGEST STRING
	char sarray[3][50] = {
		{"Hello sdsds u"},
		{"jeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"},
		{"keeeee"}};
	printf("INDEX = %d\n",index(3,50,sarray));

	///////////////////////////////////////LARGEST
	int array3[3][3] = {{1,0,1},{0,-3,5},{150,1,4}};
	printf("%d\n", largest(3, array3));

	///////////////////////////////////////SWAP CASE
	char strings2[2][50] = {{"Ahoj ako sa Mas FeRo"},
		{"jeNbvEfRtoLp"}};
	swap(2,50,strings2);
	for(int o = 0; o<2; o++){
		for(int k=0; k<50; k++){
			printf("%c",strings2[o][k]);
		}
		printf("\n");
	}


return 0;
}
void swap(const int rows, const int cols, char strings[][cols]){
	for(int o=0; o<rows; o++){
		for(int k=0; k<cols; k++){
			if(isupper(strings[o][k])){
				strings[o][k] = tolower(strings[o][k]);
			}else
				strings[o][k] = toupper(strings[o][k]);
		}
	}
}

int largest(const int size, int array[][size]){
	if(array == NULL)
		return -1;
	int number=0, pomnumber=0,index=0;
	for(int o=0; o<size; o++){
		number+=array[0][o];
	}
	for(int k=0; k<size; k++){
		for(int n=0; n<size; n++){
			pomnumber+=array[k][n];
			if(pomnumber > number){
				number = pomnumber;
				index = k;
			}
		}
	}
return index;
}
int index(const int rows, const int cols, char strings[rows][cols]){
	if(strings == NULL)
		return -1;
	int index=0,len0=strlen(strings[0]);
	for(int o=0; o<rows; o++){
		int len = strlen(strings[o]);
			if(len0 < len){
				len0 = len;
				index=o;
			}
	}
return index;
}

int max(const int size, int array[][size]){
	if(array == NULL)
		return -1;
	int number = 0;
		for(int o=0; o<size; o++){
			for(int k=0; k<size; k++){
				if(array[o][k] > number)
					number = array[o][k];
			}
		}
return number;
}
int count_vowels(const int rows, const int cols, char strings[][cols]){
	if(strings == NULL)
		return -1;
	int count =0;
	char lt;
	for(int o=0; o<rows; o++){
		for(int k=0; k<cols; k++){
			lt = tolower(strings[o][k]);
			if(lt == 'a' || lt == 'e' || lt == 'i' || lt == 'o' || lt == 'u')
				count++;
		}
	}
return count;
}

int count_zeros(const int size, int array[][size]){
	if(array == NULL)
		return -1;
	int count = 0;
	for(int o=0; o<size; o++){
		for(int k=0; k<size; k++){
			if(array[o][k] == 0){
				count++;
			}
		}
	}
return count;
}