Quiz C1-1

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Question 1

This program compiles, but does not work as expected. Select the correct replacement for a matching line of code so that it prints out “equal”.

#include <stdio.h>
int main(){
  int a = 10000000;
  short b = 10000000;
  if( a == b){
    printf("equal");
  }else{
    printf("not equal");
  }
}

Question 2

What is the output of this program

#include <stdio.h>
int main() {
  unsigned char a = -1; //this is werid, right?
  
  int b = 1;
  
  if (a < b){
    printf("Smaller");
    
  }else if( ~(a) < b){ //note that ~ compliments all the bits of a 
                       //flipping 1's to 0's and 0's to 1's
    printf("Even Smaller");
    
  }else if(sizeof(a) == sizeof(b)){
  
    printf("Same size");
  }
}

Question 3

What is the output of this program

#include <stdio.h>
int main(){
  int a = 10;
  int b = a++;
  int c = ++a;
  a = --c;
  b = c--;
  if( --a == c){
    printf("Hello");
  }else if(a == b){
    printf("world");
  }else{
    printf("!");
  }
}

Question 4

What is the output of this program

#include <stdio.h>
int main(){
  int a = 100;
  int b = 0;
  if((a & b) | b){
    printf("true\n");
  }else{
    printf("false\n");
  }
  int large = 100;
  int small = 50;
  if( large >> 1 == small){
    printf("Same\n");
  }else{
    printf("Different\n");
  }
}