I was having a trouble regarding to printing out the largest number in array in c language and i don't know how to do it while using loop. Please help me thanks

here is my code

    #include<stdio.h>
void main(){
  
  int Lnum, size;
    
    printf("Enter the size: ");
    scanf("%d", &size);
  
    int nums[size];
  
    for(int i=0; i<size; i  ){
      scanf("%d", &nums[i]);
    }
    printf("\nReversed = ");
    for(int i=size-1; i>=0; i--){
      printf("%d ", nums[i]);
    }
    
    
    for(int a=0; a<size; a  ){
    for(int i=0; i<size; i  ){
      if(nums[a]>nums[i]){
        Lnum = nums[a];
        
      }
    }
    }
    printf("\nLargest element = %d", Lnum);
}

CodePudding user response：

The algorithm for determining the largest element in an array goes as follows.

1. Use the value of the first array element as a start value for the biggest number.
2. Go over the rest of the array and check for each element if it is a bigger number.
3. When a bigger number is found use the bigger number for further comparisons.

    #include<stdio.h>
void main(){
  
  int Lnum, size;
    
    printf("Enter the size: ");
    scanf("%d", &size);
  
    int nums[size];
  
    for(int i=0; i<size; i  ){
      scanf("%d", &nums[i]);
    }
    printf("\nReversed = ");
    for(int i=size-1; i>=0; i--){
      printf("%d ", nums[i]);
    }
    
    Lnum = nums[0]; // Assume first element to be the largest element
    for(int a=1; a<size; a  ){ // start loop with second element
      if(Lnum < nums[a]) { // check if current element is larger
        Lnum = nums[a]; // found larger element, it is now the largest element of all inspected element
      }
    }
    printf("\nLargest element = %d", Lnum);
}

Output:

Enter the size: 3
1 2 3

Reversed = 3 2 1 
Largest element = 3

...Program finished with exit code 0

CodePudding user response：

What you can do is declare a int with val = 0; and store the array element in that var after comparing the element of the array contiguously with declared int variable, you will get the biggest integer at end.

#include <stdio.h>

void main()
{

    int Lnum, size, temp, temp1 = 0;

    printf("Enter the size: ");
    scanf("%d", &size);

    int nums[size];

    for (int i = 0; i < size; i  ) {
        scanf("%d", &nums[i]);
    }

    printf("\nReversed = ");
    for (int i = size - 1; i >= 0; i--) {
        printf("%d ", nums[i]);
    }

    for (int i = 0; i < size; i  ) {
        temp = nums[0];
        if (temp1 <= nums[i]) {
            temp1 = nums[i];
        }
    }
    printf("\nLargest element = %d", temp1);
}