PGM compiles, but when I run it and type my name I'm getting a segmentation fault. Any help is greatly appreciated! Thanks!!

My code:

int main(void)

    // Prompts and retreves user input.
    printf("Enter Name: ");
    string name = GetString();        

    // If GetString returns NULL wont try iterating over
    // characters that arnt there.
    if (name != NULL)
        printf("%c", name[0]);                           

        for(int i = 0; i < strlen(name); i++)
                    printf("%c", name[i]);

1 Answer 1


isblank(_), like isupper() and islower(), takes a single character as an argument. You are passing it an entire string and it's choking on it, causing a seg fault. isblank(name[i]) solves the issue nicely.

Also, I don't follow the reason for i++; inside the if loop. The for loop is incrementing i, so do you really want to increment it again inside the loop?

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  • Thanks that worked, though it looks like I still have work to do. My though process was that it was going to print out the space so I wanted to increment to print out the character after the space... instead it prints every other letter. Back to the drawing board lol. Commented Oct 6, 2015 at 6:51

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