Hi in the below code I would like to remove the blank tokens and how to achieve it. #include #include #include int count_tokens(const char* str) { int count = 0; int invalidToken = 0; // set false for(int i = 0; i <= strlen(str); i++) { if( i == strlen(str) || str[i] == 32){ // if past end of string, or if space if(invalidToken) { invalidToken = 0; // set false continue; } else { count++; // increment count only if token was not invalid continue; } } if( !(str[i] >= 97 && str[i] <= 122) ) { // if not lowercase letter invalidToken = 1; // set true } } return count; } char** split_tokens(const char* str) { char **tokenArr; tokenArr = (char **) malloc(count_tokens(str) * sizeof(char*)); /*use count_tokes() to determine the length*/ int invalidToken = 0; // set false int startIndex = 0; int arrayIndex = 0; for(int i = 0; i <= strlen(str); i++) { if( i == strlen(str) || str[i] == 32){ // if past end of string, or if space if(invalidToken) { invalidToken = 0; // set false startIndex = i + 1; continue; } else { int lengthOfTokenFound = i - startIndex; char *tokenFound; tokenFound = (char*) malloc((lengthOfTokenFound+1)*sizeof(char)); /*+1 for '\0' character */ for(int i = 0; i < lengthOfTokenFound; i++) { tokenFound[i] = str[startIndex+i]; } tokenArr[arrayIndex] = tokenFound; arrayIndex++; startIndex = i + 1; continue; } } if( !(str[i] >= 97 && str[i] <= 122) ) { // if not lowercase letter invalidToken = 1; // set true } } return tokenArr; } void printArrayOfStrings(char ** arr, int length) { printf("["); for(int i = 0; i < length; i++) { printf("'%s'", arr[i]); if(i < length-1) { printf(", "); } } printf("]\n\n"); } void main() { char myStr1[] = "abc EFaG hi"; int count1 = count_tokens(myStr1); printf("String '%s' has %d tokens.\n",myStr1, count1); char** tokArr1 = split_tokens(myStr1); printArrayOfStrings(tokArr1, count1); char myStr2[] = "ab 12 ef hi"; int count2 = count_tokens(myStr2); printf("String '%s' has %d tokens.\n",myStr2, count2); char** tokArr2 = split_tokens(myStr2); printArrayOfStrings(tokArr2, count2); char myStr3[] = "ab12ef+"; int count3 = count_tokens(myStr3); printf("String '%s' has %d tokens.\n",myStr3, count3); char** tokArr3 = split_tokens(myStr3); printArrayOfStrings(tokArr3, count3); }

Hi in the below code I would like to remove the blank tokens and how to achieve it. #include #include #include int count_tokens(const char* str) { int count = 0; int invalidToken = 0; // set false for(int i = 0; i <= strlen(str); i++) { if( i == strlen(str) || str[i] == 32){ // if past end of string, or if space if(invalidToken) { invalidToken = 0; // set false continue; } else { count++; // increment count only if token was not invalid continue; } } if( !(str[i] >= 97 && str[i] <= 122) ) { // if not lowercase letter invalidToken = 1; // set true } } return count; } char** split_tokens(const char* str) { char tokenArr; tokenArr = (char ) malloc(count_tokens(str) * sizeof(char)); /use count_tokes() to determine the length/ int invalidToken = 0; // set false int startIndex = 0; int arrayIndex = 0; for(int i = 0; i <= strlen(str); i++) { if( i == strlen(str) || str[i] == 32){ // if past end of string, or if space if(invalidToken) { invalidToken = 0; // set false startIndex = i + 1; continue; } else { int lengthOfTokenFound = i - startIndex; char tokenFound; tokenFound = (char) malloc((lengthOfTokenFound+1)sizeof(char)); /+1 for '\0' character / for(int i = 0; i < lengthOfTokenFound; i++) { tokenFound[i] = str[startIndex+i]; } tokenArr[arrayIndex] = tokenFound; arrayIndex++; startIndex = i + 1; continue; } } if( !(str[i] >= 97 && str[i] <= 122) ) { // if not lowercase letter invalidToken = 1; // set true } } return tokenArr; } void printArrayOfStrings(char arr, int length) { printf("["); for(int i = 0; i < length; i++) { printf("'%s'", arr[i]); if(i < length-1) { printf(", "); } } printf("]\n\n"); } void main() { char myStr1[] = "abc EFaG hi"; int count1 = count_tokens(myStr1); printf("String '%s' has %d tokens.\n",myStr1, count1); char tokArr1 = split_tokens(myStr1); printArrayOfStrings(tokArr1, count1); char myStr2[] = "ab 12 ef hi"; int count2 = count_tokens(myStr2); printf("String '%s' has %d tokens.\n",myStr2, count2); char tokArr2 = split_tokens(myStr2); printArrayOfStrings(tokArr2, count2); char myStr3[] = "ab12ef+"; int count3 = count_tokens(myStr3); printf("String '%s' has %d tokens.\n",myStr3, count3); char tokArr3 = split_tokens(myStr3); printArrayOfStrings(tokArr3, count3); }

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Hi in the below code I would like to remove the blank tokens and how to achieve it.

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

int count_tokens(const char* str) {

int count = 0;

int invalidToken = 0; // set false

for(int i = 0; i <= strlen(str); i++) {

if( i == strlen(str) || str[i] == 32){ // if past end of string, or if space

if(invalidToken) {

invalidToken = 0; // set false

continue;

}

else {

count++; // increment count only if token was not invalid

continue;

}

if( !(str[i] >= 97 && str[i] <= 122) ) { // if not lowercase letter

invalidToken = 1; // set true

}

return count;

}

char** split_tokens(const char* str) {

char **tokenArr;

tokenArr = (char **) malloc(count_tokens(str) * sizeof(char*)); /*use count_tokes() to determine the length*/

int invalidToken = 0; // set false

int startIndex = 0;

int arrayIndex = 0;

for(int i = 0; i <= strlen(str); i++) {

if( i == strlen(str) || str[i] == 32){ // if past end of string, or if space

if(invalidToken) {

invalidToken = 0; // set false

startIndex = i + 1;

continue;

}

else {

int lengthOfTokenFound = i - startIndex;

char *tokenFound;

tokenFound = (char*) malloc((lengthOfTokenFound+1)*sizeof(char)); /*+1 for '\0' character */

for(int i = 0; i < lengthOfTokenFound; i++) {

tokenFound[i] = str[startIndex+i];

}

tokenArr[arrayIndex] = tokenFound;

arrayIndex++;

startIndex = i + 1;

continue;

}

if( !(str[i] >= 97 && str[i] <= 122) ) { // if not lowercase letter

invalidToken = 1; // set true

}

return tokenArr;

}

void printArrayOfStrings(char ** arr, int length) {

printf("[");

for(int i = 0; i < length; i++) {

printf("'%s'", arr[i]);

if(i < length-1) {

printf(", ");

}

printf("]\n\n");

}

void main() {

char myStr1[] = "abc EFaG hi";

int count1 = count_tokens(myStr1);

printf("String '%s' has %d tokens.\n",myStr1, count1);

char** tokArr1 = split_tokens(myStr1);

printArrayOfStrings(tokArr1, count1);

char myStr2[] = "ab 12 ef hi";

int count2 = count_tokens(myStr2);

printf("String '%s' has %d tokens.\n",myStr2, count2);

char** tokArr2 = split_tokens(myStr2);

printArrayOfStrings(tokArr2, count2);

char myStr3[] = "ab12ef+";

int count3 = count_tokens(myStr3);

printf("String '%s' has %d tokens.\n",myStr3, count3);

char** tokArr3 = split_tokens(myStr3);

printArrayOfStrings(tokArr3, count3);

}

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