Question

I am trying to take user input: (1 345 44 23) and make it into a tokenized char string then into ints. Surprisingly I could not find much help for what I would think would be a common task.

Any ideas how to convert the char string into an in string using tokens?

My program crashes when it gets to the conversion (after the tokenization [I realize this is not a word]).

Thanks!

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#define StrSZE 81


void strInput (char str[], int maxChars);
void custatoi(char * tokenArray[], int * data, int numOfTok);


int main(int argc, char *argv[])
{
    char str[StrSZE];
    char* tokenArray;
    int maxChars=StrSZE-1, cont=1, numOfToken=0, i=0;
    int* data;


    strInput(str, maxChars);


    tokenArray = strtok(str, " \t");
    while (tokenArray)
    {
        printf("token: %s\n", tokenArray);
        tokenArray = strtok(NULL, " \t");
        numOfToken++;
    }


    data = (int *) malloc(numOfToken * sizeof(int));

    custatoi(tokenArray, data, numOfToken);

    system("PAUSE");
    return 0;
}



void strInput (char str[], int maxChars)
{
    char garbage;
    int k=0;

    str[0]='\0';

    printf("Please type a string of whole numbers (intigers).\n\n");

    while ((k<80) && ((str[k] = getchar()) != '\n'))
        k++;

    /* Clears the keyboard buffer.  */
    if (k==80)
        while((garbage = getchar()) != '\n')
            ;

    /* Place null at the end of the line read in from user */
    str[k]='\0';

    printf("str after input is: %s\n\n", str);
}


void custatoi(char * tokenArray[], int * data, int numOfTok)
{
    int i;

    for (i=0; i < numOfTok; i++)
        data[i] = atoi(tokenArray[i]);
}

Answer 1

I corrected the errors in yours code: There was some mistakes in main(), tokenArray data type was not correct.

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#define StrSZE 81


void strInput (char str[], int maxChars);
void custatoi(char*  tokenArray[], int * data, int numOfTok);


int main(int argc, char *argv[])
{
    char str[StrSZE];


    int maxChars=StrSZE-1, cont=1, numOfToken=0, i=0;
    int* data;
    char* tokenArray[50];    // Declared correctly 

    strInput(str, maxChars);


    tokenArray[i] = strtok(str, " \t");   // Also made a change here!
    while (tokenArray[i])
    {
        printf("token: %s\n", tokenArray[i]);
        i++;
        tokenArray[i] = strtok(NULL, " \t");
        numOfToken++;
    }


    data = (int *) malloc(numOfToken * sizeof(int));

    custatoi(tokenArray, data, numOfToken);

    printf("data\n");
    for(i=0;i<numOfToken;i++){
        printf(" %d\n",data[i]);

    }

    system("PAUSE");
    return 0;
}



void strInput (char str[], int maxChars)
{
    char garbage;
    int k=0;

    str[0]='\0';

    printf("Please type a string of whole numbers (intigers).\n\n");

    while ((k<80) && ((str[k] = getchar()) != '\n'))
        k++;

    /* Clears the keyboard buffer.  */
    if (k==80)
        while((garbage = getchar()) != '\n')
            ;

    /* Place null at the end of the line read in from user */
    str[k]='\0';

    printf("str after input is: %s\n\n", str);
}


void custatoi(char*  tokenArray[], int * data, int numOfTok)
{
    int i;

    for (i=0; i < numOfTok; i++)
        data[i] = atoi(tokenArray[i]);
}