Find the maximum length of the subarray in increasing order.

For example we have an array {5,4,6,-2,-1,0,1,9}. The biggest sub-array in increasing order is: {-2,-1,0,1,9}. So the length is 5.

#include<stdio.h>
void main () {
int arr[8] = {5,4,6,-2,-1,0,1,9},i,arrn[8],count=1,j=0,max;
printf("The given array is: ");
for(i=0;i<8;i++)
    printf("  %d" ,arr[i]); // printing the actual array  - unnecessary step.
printf("\n");
for(i=0;i<7;i++){
        if(arr[i]<arr[i+1])
        {
            count++;
        }
        else
        {
            arrn[j]=count; // adding the length of sub array
            count=1;
            j++;
        }
}
arrn[j]=count; // adding the final length
max=arrn[0];
printf("Length of sub arrays in increasing order");
for(i=0;i<=j;i++){
        if(max<arrn[i])
            max=arrn[i];
        printf(" %d",arrn[i]);  // printing the new array  - unnecessary step.
}
        printf("\n Maximum Length of the substring: %d",max); // print max value
}

   

Output
The given array is:   5  4  6  -2  -1  0  1  9
Length of sub arrays in increasing order 1 2 5
Maximum Length of the substring: 5

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Spiral Matrix

#include <stdio.h>
#define R 3
#define C 3

void spiralPrint(int m, int n, int a[R][C])
{
    int i, k = 0, l = 0;

    /*  k - starting row index
        m - ending row index
        l - starting column index
        n - ending column index
        i - iterator
    */

    while (k < m && l < n)
    {
        /* Print the first row from the remaining rows */
        for (i = l; i < n; ++i)
        {
            printf("%d ", a[k][i]);
        }
        k++;

        /* Print the last column from the remaining columns */
        for (i = k; i < m; ++i)
        {
            printf("%d ", a[i][n-1]);
        }
        n--;

        /* Print the last row from the remaining rows */
        if ( k < m)
        {
            for (i = n-1; i >= l; --i)
            {
                printf("%d ", a[m-1][i]);
            }
            m--;
        }

        /* Print the first column from the remaining columns */
        if (l < n)
        {
            for (i = m-1; i >= k; --i)
            {
                printf("%d ", a[i][l]);
            }
            l++;
        }
    }
}

/* Program to test above functions */
int main()
{
    int a[R][C] = { {1,  2,  3},
                    {8,  9,  4},
                    {7,  6,  5}
    };

    spiralPrint(R, C, a);
    return 0;
}

   

Output
1 2 3 4 5 6 7 8 9

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Find the maximum occurrence of a character in a string

#include<stdio.h>
#include<conio.h>

int main() {
   char str[20], ch;
   int count = 0, i,j=0 , max;
   int arr[10];
   printf("\nEnter a string : ");
   scanf("%s", &str);

   printf("\nEnter the character to be searched : ");
   scanf("%c", &ch);
   for (i = 0; str[i] != '\0'; i++) {
      if (str[i] == ch)
         count++;
      else if(count != 0)
      {
          arr[j] = count;
          j++;
          count = 0;
      }
   }
   arr[j]=count;
   max = 0;
       for(i=0;i<=j;i++)
        if(max<arr[i])
         max=arr[i];
   if (max == 0)
      printf("\nCharacter '%c'is not present", ch);
   else
   {
       printf("\nMaximum occurrence of character '%c' : %d", ch, max);
   }
   return (0);
}

   

Output

Enter a string : aabbbaaab

Enter the character to be searched :
Maximum occurrence of character 'a' : 3

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Clear Screen without clrscr() function call

#include<stdio.h>
void clearmyscreen();
void main()
 {
  printf("Hello");
  getch();
  clearmyscreen();
  printf("World");
  getch();
 }

void clearmyscreen()
 {
  system("cls");
 }

   

Output
World

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Find Greatest number using Conditional Operator

#include<stdio.h>

void main()
{
 int n1,n2,n3;
 printf("Enter Numbers (n1 n2 n3) : ");
 scanf("%d %d %d",&n1,&n2,&n3);
 printf("Greatest= %d",n1>n2?n1>n3?n1:n3:n2>n3?n2:n3);
}

  

Output
Enter Numbers (n1 n2 n3) : 4  9  2
Greatest= 9

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Print "Hello, World!" without semicolon

Solution: 1

#include<stdio.h>
void main(){
    if(printf("Hello world")){
    }
}

Solution: 2

#include<stdio.h>
void main(){
    while(!printf("Hello world")){
    }
}

Solution: 3

#include<stdio.h>
void main(){
    switch(printf("Hello world")){
    }
}

  

Output
Hello, World!

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