C Programming Language

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C undefined input string length program (programming.dev)

submitted 1 year ago by [email protected] to c/[email protected]

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      ' char* strInput =(char*) malloc(sizeof(char));
        int ch;
        int letNum = 0;
        while((ch = getchar()) != EOF){
                letNum++;
                strInput = (char*)realloc(strInput,letNum*sizeof(char));
                *(strInput + letNum - 1) = ch;
        }
        printf("\n");
        printf("%s\n",strInput);
        free(strInput);`

This is the contents of main in a program I wrote that takes an undefined number of chars and prints the final string. I don't understand why but it only works if I press ctrl+D twice, and only once if I press enter before.

does anyone get what's going on? And how would you have written the program?

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[–] [email protected] 2 points 1 year ago

Thanks a lot for the in depth explanation, this makes things a lot clearer. I'll try 'putchar()' and test a few more things and then come back to read this post again