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Accenture Coding Question 7

Coding Question 7
You are given a function, Void *ReplaceCharacter(Char str[], int n, char ch1, char ch2);
The function accepts a string ‘ str’ of length n and two characters ‘ch1’ and ‘ch2’ as its arguments . Implement the function to modify and return the string ‘ str’ in such a way that all occurrences of ‘ch1’ in original string are replaced by ‘ch2’ and all occurrences of ‘ch2’ in original string are replaced by ‘ch1’.
Assumption: String Contains only lower-case alphabetical letters.
Note:
- Return null if string is null.
- If both characters are not present in string or both of them are same , then return the string unchanged.
Example:
- Input:
- Str: apples
- ch1:a
- ch2:p
- Output:
- Paales
Explanation:
‘A’ in original string is replaced with ‘p’ and ‘p’ in original string is replaced with ‘a’, thus output is paales.
C
#include <stdio.h> #include <string.h> void *ReplaceCharacter(char str[], int n, char ch1, char ch2) { int i; for(i=0; i<n ; i++) { if(str[i]==ch1) { str[i]=ch2; } else if(str[i]==ch2) { str[i]=ch1; } } printf("%s",str); } int main() { char a[100]; char b, c; int len; scanf("%s",a); scanf("%s",&b); scanf("%s",&c); len = strlen(a); ReplaceCharacter(a, len, b, c); return 0; }
Output:
apples
a
p
paales
Python
def swap (user_input, str1, str2): result = '' if user_input != None: result = user_input.replace(str1, '*').replace(str2, str1).replace('*', str2) return result return 'Null' user_input = input() str1, str2 = map(str,input().split()) print(swap(user_input, str1, str2))
Output:
apples
a p
paales