kernighan-and-ritchie

I'm new to C programming, I encountered a problem. In case of complicated declarations i found this int *daytab[13]; // daytab is an array of 13 pointers to int which means daytab is the name of the array and the name of the array points to the first element of the array. The array name is not compatible with pointer manipulation like daytab++ etc (correct me if I'm wrong). But I found this code written in Dennis Ritchie main(int argc, char * argv[]) { while( --argc > 0 ) printf("%s%s",*++argv,(argc>1) > " " : ""); printf("\n"); return 0; } How can they manipulate argv ? Is it not the array

This question already has an answer here: K&R answer book exercise 1.21 2 answers This is the question I am trying to understand: Write a program 'entab' that replaces strings of blanks by the minimum number of tabs and blanks to achieve the same spacing. When either a tab or a single blank would suffice to reach a tab stop, which should be given preference? Decoding the question: a . It's a program that injects 'tabs' in the input. b . If a string consists of continuous blank spaces, then these blank spaces has to be replaced with minimum number of tabs and spaces. How should the program

This question already has an answer here: Difference between int and char in getchar/fgetc and putchar/fputc? 2 answers Well, i've read some months ago another "well know" C book(in my language), and i never learn't nothing about this. The way that K&R writes 3 chapters in 20 pages it's simply amazing, and of course that i can't expect huge explanations, but that also rises questions. I have a question about this point 1.5.1 The book says(pag 16): main(){ int c;// <-- Here is the question c=getchar(); while (c != EOF){ putchar(c); c = getchar(); } } [...] The type char is specifically meant

I am reading " The C programming Language " by Brian W. Kernighan and Dennis M. Ritchie. In chapter 1.2 "Variables and Arithmetic Expressions" they demonstrate a simple Fahrenheit to Celsius converter program. When I compile the program (Terminal.app, macOS Sierra), I get this warning: $ cc FtoC.c -o FtoC.o FtoC.c:5:1: warning: type specifier missing, defaults to 'int' [-Wimplicit-int] main() ^ 1 warning generated. This is the C program: FtoC.c: 1 #include <stdio.h> 2 3 /* print Fahrenheit-Celsius table 4 for fahr = 0, 20, ..., 300 */ 5 main() 6 { 7 int fahr, celsius; 8 int lower, upper, step;

I am trying to learn C with The C programming Language by K&R . I am trying to write a the strcat() program using pointers. char *strcat (char *s, char *t){ char *d; d = s; while(*s++); s--; while(*s++ = *t++); return d; } int main () { char *name1; char *name2; name1 = "stack" ; name2 = "overflow"; printf("%s %s\n", name1, name2); printf("strcat out : %s", strcat(name1, name2)); return 0; } But I am getting the ouput as stack overflow Segmentation fault Why is it not working ? Can anybody clarify the mistake here.. Because the pointers are pointers to literals, and not only are those read

This is taken directly from the K&R book: The precedence of != is higher than that of = , which means that in the absence of parentheses the relational test != would be done before the assignment = . So the statement c = getchar() != EOF is equivalent to c = (getchar() != EOF) This has the undesired effect of setting c to 0 or 1, depending on whether or not the call of getchar returned end of file. (More on this in Chapter 2.) Exercise 1-6. Verify that the expression getchar() != EOF is 0 or 1. I am having trouble understanding how to do this exercise as well as understanding what is going on

I'm learning C and I can't figure out one of the K&R exercises, the listing: Exercise 2-3, Write the function htoi(s) , which converts a string of hexadecimal digits (including an optional 0x or 0X ) into its equivalent integer value. The allowable digits are 0 through 9 , a through f and A through F . I suppose I need to do some recursion here, I just guess that I don't know a lot about the numbering types, and their various conversion methodologies, etc. Could someone give me some pointers on how best to understand it, I'm not looking for someone to hold my hand, but instead direct me to a