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C program to reverse every word of the given string

Here, we are going to learn how to reverse every word of the given string in C programming language?
Submitted by Nidhi, on July 17, 2021

Problem Solution:

Read a string and then reverse every word of the given string using C program.

Program:

The source code to reverse every word of the given string is given below. The given program is compiled and executed using GCC compile on UBUNTU 18.04 OS successfully.

// C program to reverse every word of given string

#include <stdio.h>
#include <string.h>

int main()
{
    char str[64];
    char words[6][10];
    char temp;

    int i = 0;
    int j = 0;
    int k = 0;
    int ii = 0;
    int l = 0;

    printf("Enter string: ");
    scanf("%[^\n]s", str);

    while (str[i] != 0) {
        if (str[i] == ' ') {
            words[k][j] = '\0';
            k++;
            j = 0;
        }
        else {
            words[k][j] = str[i];
            j++;
        }
        i++;
    }
    words[k][j] = '\0';

    for (i = 0; i <= k; i++) {
        l = strlen(words[i]);

        for (j = 0, ii = l - 1; j < ii; j++, ii--) {
            temp = words[i][j];
            words[i][j] = words[i][ii];
            words[i][ii] = temp;
        }
    }

    printf("Result: \n");
    for (i = 0; i <= k; i++)
        printf("%s ", words[i]);
}

Output:

RUN 1:
Enter string: Hello World
Result: 
olleH dlroW

RUN 2:
Enter string: Google Yahoo Bing
Result: 
elgooG oohaY gniB 

RUN 3:
Enter string: IncludeHelp.com
Result: 
moc.pleHedulcnI 

Explanation:

In the main() function, we created a string str and read the value of str from the user. Then we reverse each word of the string and print the result on the console screen.

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