Question

Program in C

Write a function that replaces the contents of a string with the string reversed.

Answer 1

Code:

#include <stdio.h>

//Here is the actual function for the question

void str_reverse(char *str){

int len=0;

//calcualting length

while(str[len]!='\0'){

len++;

}

int front=0,rare=len-1;

//inplace string reverse

//replacing the first and last character of the string

while(front<rare){

char temp=str[front];

str[front]=str[rare];

str[rare]=temp;

//repeating the process untill front and rare crosses each other

front++;

rare--;

}

}

//Here is the test question

int main(void) {

char s[100];//creating a string

printf("Enter a string:");

scanf("%s",s);

str_reverse(s);//passing it the function

printf("Same string after passing to the function str_reverse\n");

printf("%s\n",s);

printf("Contents of the string has been changed");

return 0;

}

Snapshot:

Sample run:

Enter a string:samantha
Same string after passing to the function str_reverse
ahtnamas

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