Skill Rack Daily Challenge Solution - 05/04/2019

Skill Rack

Daily Challenge Solution

Date : 05/04/2019

ProgramID- 8469

Inplace Swap First Half and Second Half

The program must swap the first half and second half in the string str passed as the argument to the function swapFirstHalfSecondHalf.

Note: The length of the string str is always even.

Example Input/Output 1:
Input:
capslock
Output:
lockcaps
Explanation:
The first half of the string str is "caps".
The second half of the string str is "lock".
After swapping, the str becomes "lockcaps".
Example Input/Output 2:
Input:
keymap
Output:
mapkey

Solution:
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void swapFirstHalfSecondHalf(char *str)
{
    int l,i;
    char *str1,*str2;
    str1=(char *)malloc(50);
    str2=(char *)malloc(50);
    l=strlen(str);
    int j=0;
    for(i=0;i<(l/2);i++)
    {
        str1[j]=str[i];
        j++;
    }
    j=0;
    for(i=(l/2);i<l;i++)
    {
        str2[j]=str[i];
        j++;
    }
    strcat(str2, str1);
    for(int k=0;k<l;k++)
    {
        str[k]=str2[k];
    }
}

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