Copying portions of arrays?

I am currently taking a C class, and I have been assigned to

1. Prompt the user and accept a string of no more than 254 characters
2. Prompt the user and accept a second string of no more than 254 characters
3. Create a third string consisting of the first half of string (1) and the second half of string (2). Display this string

I know how to prompt for strings, but I'm having a little difficulty figuring out what tools I should use for this. I'm thinking that if I could get the length of the strings, I could divide the numbers in two, and I could use those numbers to create a loop and display the characters using < & >. However, I don't know how I would do this, or even if this is the correct method. Any help would be greatly appreciated.

You can use a loop until you find the '\0' character and increment your count variable to find out how many characters are in each string.

ex)

Code:

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for(stringCount=0; string[stringCount]!='\0' ;stringCount++)

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Thank you! It helped, and I was able to pull it off. However, I have a new issue. I'm trying to get a character count, and I'm having an issue with any showing up. Perhaps you could help me with what I'm messing up on:

Code:

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






int main()
{
    char str1[255], str2[255], combinedStr [255], newSentence [101];
    int lenOfStr1, lenOfStr2, lenOfNewSent, newSentenceArray [128]={0}, totalArray [128]={0};
    char currentChar, currentChar2;
    int i = 0, totLtrs = 0;
    double percentage = 0.00;


    printf("Please enter a string of 254 characters or less:");
    fgets(str1,254,stdin);
    printf("Please enter a second string of 254 characters or less:");
    fgets(str2,254, stdin);
    lenOfStr1 = strlen (str1);
    lenOfStr2 = strlen (str2);
    str1[lenOfStr1 - 1] = '\0';
    str2[lenOfStr2 - 1] = '\0';
    printf("Your first  string is %d characters long.\n", lenOfStr1);
    printf("Your second string is %d characters long.\n", lenOfStr2);
    strncpy(combinedStr, str1, lenOfStr1 / 2);
    combinedStr[lenOfStr1 / 2] = '\0';
    strcat(combinedStr, str2 + lenOfStr2 / 2);
    printf("String 3 is %s\n", combinedStr);
    printf("Now, please enter a sentence of up to 100 characters:");
    fgets(newSentence, 100, stdin);


    lenOfNewSent = strlen (newSentence);
    newSentence[lenOfNewSent - 1] = '\0';


    while (newSentence[i] != '\0')
    {
        currentChar = newSentence[i];
        newSentenceArray[currentChar]++;
        ++i;
    }


    totLtrs = i;


    printf("\nFor the string you just wrote\n\n\n", i);
    printf("FREQUENCY TABLE\n-------------------\nChar  Count  %% of Total\n");
    printf("----  -----  ----------\nALL\t%d\t100.00%%\n", totLtrs, percentage);


    for (i=0; i < 128; ++i)
    {
        if (newSentenceArray[i] > 0)
        {
            printf("'%c'\t%d\t%-2.2f%%\n", i, newSentenceArray[i], percentage = ((double) newSentenceArray[i]/(double) totLtrs) * 100.00);
        }
    }


    strcpy (combinedStr, str1);
    strcat (combinedStr, str2);
    strcat (combinedStr, newSentence);
    lenOfNewSent = strlen (combinedStr);
    combinedStr[lenOfNewSent - 1] = '\0';
    i=0;


    printf("The new combinesStr is %s", combinedStr);




    while (combinedStr[i] != '\0')
    {
        currentChar2 = totalArray[i];
        totalArray[currentChar2]++;
        ++i;
    }


    totLtrs = i;
    printf("i is %d", i);


    printf("\nFor everything you've written\n\n\n");
    printf("FREQUENCY TABLE\n-------------------\nChar  Count  %% of Total\n");
    printf("----  -----  ----------\nALL\t%d\t100.00%%\n", totLtrs);


    for (i=0; i < 128; ++i)
    {
        if (totalArray[i] > 0)
        {
            printf("'%c'\t%d\t%-2.2f%%\n", i, totalArray[i], percentage = ((double) totalArray[i]/(double) totLtrs) * 100.00);
        }
    }










    return 0;
}

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The first loop works perfectly, but I can't get anything with the second. Any ideas?

Check line 80. You're probably using the wrong array.

Bye, Andreas

Quote:

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Originally Posted by AndiPersti

Check line 80. You're probably using the wrong array.

Bye, Andreas

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What? No, I checked that out a dozen times last ni.... ohhhhHHHHHHHHHHHHHHH ARRGGGHHHHH!!!!!!

HOW COULD I HAVE MISSED THAT??!!!!!

*clears throat*

Thank you, that was quite helpful.