Question

How to remove a random word from a string in C

Answer 1

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

void remove_random_word(char *str) {
    char *words[128];
    int word_count = 0;
    char *token = strtok(str, " ");
   
    // Split the string into words
    while (token != NULL) {
        words[word_count++] = token;
        token = strtok(NULL, " ");
    }
    
    // Seed the random number generator
    srand(time(NULL));

    // Select a random word to remove
    int random_index = rand() % word_count;

    // Reconstruct the string without the random word
    char tmpStr[1024] = "";
    for (int i = 0; i < word_count; i++) {
        if (i != random_index) {
            strcat(strcat(tmpStr, words[i]), " ");
        }
    }
    
    tmpStr[strlen(tmpStr) - 1] = '\0';
    
    
    strcpy(str, tmpStr);
}

int main() {
    char str[] = "Im not clumsy The floor just hates me";
    printf("str: %s\n", str);
    
    remove_random_word(str);
    printf("result: %s\n", str);
    
    return 0;
}


/*
run:

str: Im not clumsy The floor just hates me
result: Im not clumsy floor just hates me

*/

 

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