C Tutorial/Operator/sizeof operator

Demonstrating the sizeof operator

<source lang="cpp">#include <stdio.h> int main() {

  char c;           
  short s;         
  int i;       
  long l;         
  float f;        
  double d;         
  long double ld;   
  int array[ 20 ];  /* create array of 20 int elements */
  int *ptr = array; /* create pointer to array */
  printf( "     sizeof c = %d\tsizeof(char)  = %d"   
          "\n     sizeof s = %d\tsizeof(short) = %d"   
          "\n     sizeof i = %d\tsizeof(int) = %d"   
          "\n     sizeof l = %d\tsizeof(long) = %d"   
          "\n     sizeof f = %d\tsizeof(float) = %d"   
          "\n     sizeof d = %d\tsizeof(double) = %d"   
          "\n    sizeof ld = %d\tsizeof(long double) = %d"   
          "\n sizeof array = %d"   
          "\n   sizeof ptr = %d\n",    
         sizeof c, sizeof( char ), sizeof s, sizeof( short ), sizeof i,
         sizeof( int ), sizeof l, sizeof( long ), sizeof f, 
         sizeof( float ), sizeof d, sizeof( double ), sizeof ld, 
         sizeof( long double ), sizeof array, sizeof ptr );  
  return 0; 

}</source>

sizeof c = 1       sizeof(char)  = 1
     sizeof s = 2       sizeof(short) = 2
     sizeof i = 4       sizeof(int) = 4
     sizeof l = 4       sizeof(long) = 4
     sizeof f = 4       sizeof(float) = 4
     sizeof d = 8       sizeof(double) = 8
    sizeof ld = 12      sizeof(long double) = 12
 sizeof array = 80
   sizeof ptr = 4