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Reverse a string in C/C++
Here is an example to reverse a string in C language,
Example
#include<stdio.h>
#include<string.h>
int main() {
char s[50], t;
int i = 0, j = 0;
printf("\nEnter the string to reverse :");
gets(s);
j = strlen(s) - 1;
while (i < j) {
t = s[i];
s[i] = s[j];
s[j] = t;
i++;
j--;
}
printf("\nReverse string is : %s", s);
return (0);
}Output
Here is the output
Enter the string to reverse: Here is the input string. Reverse string is : .gnirts tupni eht si ereH
In the above program, the actual code to reverse a string is present in main(). A char type array is declared char[50] which will store the input string given by user.
Then, we are calculating the length of string using library function strlen().
j = strlen(s) - 1;
Then, we are swapping the characters at position i and j. The variable i is incremented and j is decremented.
while (i < j) {
t = s[i];
s[i] = s[j];
s[j] = t;
i++;
j--;
}
Updated on: 25-Jun-2020
1K+ Views
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