How can I reverse an array of characters in c language

Question

Reversing an array of characters
https://code.sololearn.com/cNbKE9Lav9YG/?ref=app

Answer 1

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(){
int i,j,tmp;
char str[20];
printf("enter name:");
scanf("%s",str);
for(i=0,j=strlen(str)-1;i<j;i++,j--){
tmp=str[i];
str[i]=str[j];
str[j]=tmp;
}
for(i=0;i<strlen(str);i++)
printf("%c",str[i]);

}

Answer 2

for( i = 0.......)
last for(..... i < strlen(str).....) without - 1
last printf : printf("%c"....)

Answer 3

This is mine :
https://code.sololearn.com/cfiYnS58f8tO/?ref=app

Answer 4

Bahha🐧 's answer is good, but I recommend to store strlen(str) in a variable (in the last for loop), otherwise it will keep calling the function over and over again, it' s different with the first forloop where the length of str stored in j (strlen only called once). This might not be a problem for you if time complexity is not in your concern.