HomeWork C Day2

#include <stdio.h>

//funkciq zadacha 1
int swap(int* a, int* b){
    int temp = *a;
    *a = *b;
    *b = temp;
}

//funkciq zadacha 2
int sumArr(int *arr, int n){
    int sum = 0;
    for(int i = 0; i < n; i++){
        sum+= *(arr + i);
    }
    return sum;
}

//funkciq zadacha 3
int minNumber(int* arr, int n){
    int min = *arr;
    for(int i = 0; i < n; i++){
        if(*(arr + i) < min){
                min = *(arr + i);
        }
    }
    return min;
}

//funkciq zadacha 4
int maxNumber(int* arr, int n){
    int max = *arr;
    for(int i = 0; i < n; i++){
        if(*(arr + i) > max){
                max = *(arr + i);
        }
    }
    return max;
}

//funkciq zadacha 5
int sumArrays(int *arr, int n){
    int sum = 0;
    for(int i = 0; i < n; i++){
        sum+= *(arr + i);
    }
    return sum;
}

//funkciq zadacha 6
int isLower(char sym){
    if(sym >= 'a' && sym <= 'z'){
        return 1;
    }else{
        return 0;
    }
}

//funkciq zadacha 7
int isUpper(char sym){
    if(sym >= 'A' && sym <= 'Z'){
        return 1;
    }else{
        return 0;
    }
}

//funkciq zadacha 8
int isLetter(char sym){
    return isLower(sym) || isUpper(sym) ? 1: 0;
}

//funkciq zadacha 9
int isDigit(char* sym){
    return (sym >= '0' && sym <= '9') ? 1 : 0;
}

//funkciq zadacha 10
int isNumber(char* number){
    while(*number){
        if(!isDigit(*number)){
            return 0;
        }
      number++;
    }
    return 1;
}

//funkciq zadacha 11
int strSize(char* str){
    int i = 0;
    while(*str != 0){
       str++;
       i++;
    }
    return i;
}

int strToNum(char* str){
    if(isNumber(str)){
        int number = 0;
        int power = 1;
        for(int i = strSize(str) - 1; i >= 0; i--){
            number += (str[i] - '0') * power;
            power *= 10;
        }
        return number;
    }
    printf("Error");
    exit(1);
}

int main(){

    //zadacha 1

    /*
    int a, b;
    printf("Enter a: ");
    scanf("%d", &a);
    printf("Enter b: ");
    scanf("%d", &b);
    printf("a = %d, b = %d\n", a, b);
    swap(&a, &b);
    printf("After swapping: \n");
    printf("a = %d, b = %d\n", a, b);
    */

    //zadacha 2

    /*
    int arr[] = {1, 4, 5, -1, 3, 5};
    int s = sumArr(arr, 6);
    printf("Sum = %d\n", s);
    */

    //zadacha 3

    /*
    int arr[5] = {2, 6, 8, 3, 7};
    printf("Min = %d", minNumber(arr, 5));
    */

    //zadacha 4

    /*
    int arr[5] = {2, 6, 8, 3, 7};
    printf("Max = %d", maxNumber(arr, 5));
    */

    //zadacha 5

    /*
    int arr[] = {1, 4, 5, -1, 3, 5};
    int s = sumArrays(arr, 6);
    printf("Sum = %d\n", s);
    */

    //zadacha 6

    /*
    if(isLower('t')){
        printf("Yes");
    }else{
        printf("No");
    }
    */

    //zadacha 7

    /*
    if(isUpper('T')){
        printf("Yes");
    }else{
        printf("No");
    }
    */

    //zadacha 8

    /*
    if(isLetter('a')){
        printf("Yes");
    }else{
        printf("No");
    }
    */

    //zadacha 9

    /*
    if(isDigit('5')){
        printf("Yes");
    }else{
        printf("No");
    }
    */

    //zadacha 10

    //printf("%d", isNumber("55555555"));

    //zadacha 11

    /*
    int a = strToNum("123");
    printf("%d\n", a);
    */

    return 0;
}