Useful C programs.doc - Table of Contents Types Operators...

Table of Contents
Types, Operators and Expressions ......................................................................................................... 1
Control Flow .......................................................................................................................................... 2
Functions and Program structure .......................................................................................................... 3
Pointers and Arrays ................................................................................................................................ 5
Structures .............................................................................................................................................. 6
Input and Output ................................................................................................................................... 7
Types, Operators and Expressions
1. Write a program to convert a given number of days into months and days.
2. Write a program to read length and width from the input and compute perimeter and area of the
rectangle.

area=length*width; //calculates area
perimeter=2*(length+width);//calculates perimeter
printf("Area is %f and perimeter is%f",area,perimeter);
}
Output:
[[email protected] ~]$ gcc area_peri.c
[[email protected] ~]$ ./a.out
Enter the length and width of a reactangle:2.5 3
Area is 7.500000 and perimeter is11.000000[
3. Write a program to read the diameter of the circle and compute the perimeter and area of the
circle.
4. Write a program to read a floating point number from the standard input and print right most digit
of the integral part and left most digit of real part.

real_part=real_part*10;//gives the rightmost digit of intger part
r_num=(int)real_part;
printf("\n leftmost digit of realpart is %d\n right most digit of integral part is %d",r_num,i_num);
return EXIT_SUCCESS;
}
Output:
[[email protected] ~]$ gcc floatir.c
[[email protected] ~]$ ./a.out
Enter floating type number:1234.56
integral part is 1234
real part is 0.560059
leftmost digit of realpart is 5
right most digit of integral part is 4