/* Advanced conditionals */

#include <stdio.h>
#include <math.h>

void main(void) {

  int var1 = 10;
  int var2 = 20;
  float var3 = 0.544;
  float var4 = 0.988;

/* Initialise variables */

  if( var1 == var2 ) {

    printf("var1 equal to var2\n");
  }

  if( var1 != var2 ) {

    printf("var1 not equal to var2\n");
  }

  if( var1 >= var2 ) {

    printf("var1 greater than or equal to var2");

    if( var3 >= var4 ) {
      
      printf("and var3 greater than equal to var4/n");
    }
    else {
      
      printf("and var3 smaller than var4/n");
    }
  }

  if( var1 < var2 && var1 < var4 )
    
    printf("var1 smaller than var2 and var4\n");
  
  if( (var1 < var2 && var2 < var3) || var4 == var3 )

    printf("explain vocally!\n");

  if( sqrt(10) > 3 )
    printf("square root of 10 bigger than 3\n");

  if( var1 = var2 )
    printf("probably a typo\n");
}