fig02_13.c

C程序设计经典教程第5版程序示例,比较适合初级c语言的学生

/* Fig. 2.13: fig02_13.c
   Using if statements, relational 
   operators, and equality operators */
#include <stdio.h>

/* function main begins program execution */
int main( void )
{
   int num1; /* first number to be read from user  */
   int num2; /* second number to be read from user */
   
   printf( "Enter two integers, and I will tell you\n" );
   printf( "the relationships they satisfy: " );

   scanf( "%d%d", &num1, &num2 ); /* read two integers */
   
   if ( num1 == num2 ) { 
      printf( "%d is equal to %d\n", num1, num2 );
   } /* end if */

   if ( num1 != num2 ) {
      printf( "%d is not equal to %d\n", num1, num2 );
   } /* end if */

   if ( num1 < num2 ) { 
      printf( "%d is less than %d\n", num1, num2 );
   } /* end if */

   if ( num1 > num2 ) { 
      printf( "%d is greater than %d\n", num1, num2 );
   } /* end if */

   if ( num1 <= num2 ) { 
      printf( "%d is less than or equal to %d\n", num1, num2 );
   } /* end if */

   if ( num1 >= num2 ) {
      printf( "%d is greater than or equal to %d\n", num1, num2 );
   } /* end if */

   return 0; /* indicate that program ended successfully */

} /* end function main */



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