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Reverse a String In-Place

Code

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

void reverse_string(char *str) {
    // Your logic here
    uint8_t n=strlen(str);
    for(uint8_t i=0;i<n/2;i++)
    {
        uint8_t temp=str[i];
        str[i]=str[n-i-1];
        str[n-i-1]=temp;
    }

}

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