How does c structure loop? why is the variable not assigned the value at position (2) of the program? it only prints in position (1)?

Question


#include <stdio.h>

int main()
{
    char c;
    char d[10000];
    int i = 0, nl = 0,ll = 0,k = 0;
    int maxi = 0;
    while((c=getchar()) != EOF){
        d[i]=c;
        if(c == '\n'){
            ++nl;
            ll = i - k; //line length
            k = i;
            if(maxi<=ll){
                maxi=ll;
                printf("%d",maxi); //**(1)**
            }
        }
        ++i;
    }
    // printf("%d",maxi); **(2)**
}

why is the variable not assigned the value at position (2) of the program? it only prints in position (1)?

regarding: `while((c=getchar()) != EOF)` the function: `getchar()` returns a `int` not a `char`. In most circumstances, a `char` will fail to compare to `EOF`. Suggest: `int c; ... while( (c = getchar() ) != EOF)` — user3629249, Nov 13 '19 at 03:09
[Difference between int and char in getchar/fgetc and putchar/fputc?](https://stackoverflow.com/questions/35356322/difference-between-int-and-char-in-getchar-fgetc-and-putchar-fputc) — Antti Haapala -- Слава Україні, Nov 13 '19 at 04:10
i want to print out the total number of letters in longest word, and when printf is as marker 1 it gives the output but when it is at marker 2 it doesnt even return a value. — Krishbin Paudel, Nov 14 '19 at 04:21

score 1 · Answer 1 · answered Nov 13 '19 at 04:40

You should get into the habit of putting a newline (\n) at the end of your printf formats. That will usually make the data easier to read, and it will mostly save you from having to think about stdout buffering. (q.v.)

Also, I've heard that some IDEs swallow the last line of output if it's not terminated with a newline.

Sometimes, of course, you will want to use more than one printf call to print a single line; in that case, you only put the \n for the last printf in the line. But the normal case is that every format string ends with \n.

How does c structure loop? why is the variable not assigned the value at position (2) of the program? it only prints in position (1)?

1 Answers1