Answer Posted / manoj

#include <stdio.h>


void reverse(char s[])
{
int low; /* index in the lower half of the array s */
int high; /* index in the upper half of the array s */
char c; /* for holding intermediate strings */
int len; /* the length of the string s */

/* Initialize len to the length of the string */
for (len=0;s[len]!='\0';len++) ;

/* Let low increase and high decrease until they meet */
low = 0;
high = len-1;
while (low<high) {
/* Switch the values of s[low] and s[high] */
c = s[low];
s[low] = s[high];
s[high] = c;
low++;
high--;
}
}


main()
{
int c;
char line[80]; /* array to hold a line of input */
int i; /* to use as an index in the array */

c = getchar();
i = 0;

/* Read input until EOF (CTRL-z) */
while (c != EOF) {
if (c != '\n') {
/* Put anything else but newline in the array */
line[i] = c;
i++;
}

if (c == '\n') {
/* For a newline, reverse and print the line and start new line */
line[i] = '\0';
reverse(line);
printf("%s",line);
putchar(c);
i = 0;
}

c = getchar();
}
}

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