Programming for Chemical Engineers Using C, C++, and MATLAB®

12 Programming for Chemical Engineers

6 double ave;

7 printf(“ Enter three numbers\n”);

8 printf(“\n First number: “);

9 scanf(“%lf”,&num1);

10 printf(“\n Second number: “);

11 scanf(“%lf”,&num2);

12 printf(“\n Third number: “);

13 scanf(“%lf”,&num3);

14 ave=(num1+num2+num3)/3;

15 printf(“\n The average is %lf.\n”,ave);

16 system(“pause”);

17 return(0);

18 }

Lines 1, 2: Again, the #include statement tells the C compiler to use the <stdio.h>

and

<stdlib.h> header files, which contain the standard input/output

functions

printf(), scanf() and the system() function.

Line 3: The

main() function is where the main operation of the program occurs.

Lines 5, 6: Declaration ...