This is a C program to reverse a string without using the library function strrev().
The program finds the length of the string using a while loop. A string is terminated with a NULL character (\0). The program finds the length by looking for the NULL character and then prints the array elements starting from the second last character to the first.
If the user inputs "frog pond" the program prints "dnop gorf"
str_reverse.c
// This is a program to reverse a string #include <stdio.h> #include <conio.h> int main() { int i, len; char str[100]; // Read string input printf("Enter a string \n"); gets(str); // Find the length of the string len = 0; while (str[len] !='\0') { len++; } // Print the string in reverse order for (i=len-1; i >= 0; i--) { printf("%c",str[i]); } // Wait for key press getch(); return 0; }
