Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int n;
    char temp;
    for(n=0;str[n]!='\0';n++);
    for(int i=0;i<n;i++)
    {
        if(str[i]!=str[n-1])
        {
            temp=str[i];
            str[i]=str[n-1];
            str[n-1]=temp;
        }
        n--;
    }
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    int i = 0;
    while (str[i] != '\0') {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    reverse_string(str);
    printf("%s", str);
    return 0;
}

Solving Approach

 

 

 

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Input

firmware

Expected Output

erawmrif