DS Made easy

Question

Comments

They ain't going to ask such question which cause ambiguity.

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#include<stdio.h>  
int main()  {
    int a[] = {10, 20, 30, 40, 50};
    int *p[] = {a+1, a, a+4, a+3, a+2};
    int **ptr = p;
    ptr++;
    printf("%d%d", ++ptr-p, **ptr);  
    
} 

the answer should be $210$

#include<stdio.h>  
int main()  {
     int a[] = {10, 20, 30, 40, 50};
     int *p[] = {a+1, a, a+4, a+3, a+2};
     int **ptr = p;
     ptr++;
     printf("%d", ++ptr-p);
     printf("%d", **ptr);  
    
}

the answer should be $250$

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How to understood which one should be executed first?

Answer 1

Answer  is 2 and 50

Answer 2

Getting 250 

Comments

how do you know to follow right to left convention rather than left to right

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That is by convention that I have been following for all the problems, haven't find any issue yet and most of the compiler follow the same convention.

The logic that I had is the printf starts execution from " (left double quote) and if it has any string to print it prints and if there is any format specifier it it goes to value part( after "(right double quote)) and gets the value and prints it on the o/p screen if the another found then it goes for the next value part.

for example:

    int i=1;
    printf("%d %d",i++,i); //1 2 is displayed

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try to do this ans will be 2 2 0

#include <stdio.h>

int main(void) {
    int i=0;
    printf("%d %d %d",i,++i,i++);
    return 0;
}