Question

Write a C program that prompts the user for an input string with all lowercase letters. Your program should then sort the characters in the string and print the sorted string. Assume that the string contains no spaces and has at most 30 lowercase characters. Your program should loop continually until the user enters “q” to quit.

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Answer #1

#include <stdio.h>
#include <string.h>

void sort(char arr[]) {
   int len = strlen(arr);
   int i, j;
   char ch;
   for(i = 0; i < len; ++i) {
       for(j = 0; j < len-1; ++j) {
           if(arr[j] > arr[j+1]) {
               ch = arr[j];
               arr[j] = arr[j+1];
               arr[j+1] = ch;
           }
       }
   }
}

int main()
{
    char arr[100];
    while(1) {
       printf("Enter a lowercase string(no spaces): ");
       scanf("%s", arr);
       if(strcmp(arr, "q") == 0) {
           break;
       }
       sort(arr);
       printf("Sorted: %s\n", arr);
   }
    return 0;
}

Enter a lowercase string no spaces hello orted: ehllo nter a lowercase string no spaces> ronaldo Sorted: Enter a ad「noor lowe

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