Trace the output of the following program#include<stdio.h>void main( ){ int K[2][4] = {-40, 36, -55, -88, 65, 74, -99, -24}; printf("%u, %d, %u, %d \n",*K-1,K[1][3]-4, K-1, **K+42); }a.Address 1, -28, Address 2, -2b.Address 1, -28, Address 2, 2c.Address 1, 2, Address 2, -28d.Address 1, -2, Address 2, 28
Question
Trace the output of the following program#include<stdio.h>void main( ){ int K[2][4] = {-40, 36, -55, -88, 65, 74, -99, -24}; printf("%u, %d, %u, %d \n",*K-1,K[1][3]-4, K-1, **K+42); }a.Address 1, -28, Address 2, -2b.Address 1, -28, Address 2, 2c.Address 1, 2, Address 2, -28d.Address 1, -2, Address 2, 28
Solution
To trace the output of the given program, let's analyze the code step by step:
-
The program includes the standard input/output library,
stdio.h. -
The
main()function is defined. -
Inside the
main()function, a 2-dimensional arrayKof size 2x4 is declared and initialized with the values {-40, 36, -55, -88, 65, 74, -99, -24}. -
The
printf()function is called to print the output. It contains four placeholders:%u,%d,%u, and%d. -
The first placeholder,
%u, is used to print the value at the address*K-1. -
The second placeholder,
%d, is used to print the value at the addressK[1][3]-4. -
The third placeholder,
%u, is used to print the value at the addressK-1. -
The fourth placeholder,
%d, is used to print the value at the address**K+42.
Based on the given initialization of the array K, let's calculate the values for each placeholder:
-
The value at the address
*K-1is the value at the address of the first element of the arrayKminus 1. Since the first element is -40, the value at this address is -41. -
The value at the address
K[1][3]-4is the value at the address of the element in the second row and fourth column of the array `
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Trace the output of the following program#include<stdio.h>void main( ){ int K[2][4] = {-40, 36, -55, -88, 65, 74, -99, -24}; printf("%u, %d, %u, %d \n",*K-1,K[1][3]-4, K-1, **K+42); }a.Address 1, -28, Address 2, -2b.Address 1, -28, Address 2, 2c.Address 1, 2, Address 2, -28d.Address 1, -2, Address 2, 28
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