矩形的面积和周长的C程序

Input: 20 30
Output: area of rectangle is : 600
   perimeter of rectangle is : 100

START
   In Function int area(int a, int b)
   Step 1 -> Declare an integer ‘area’ and store a * b in it
   Step 2 -> Return area.
   In Function int perimeter(int a, int b)
   Step 1-> Declare an integer ‘perimeter’ and store 2*(a + b) in it
   Step 2-> Return perimeter
   In int main()
   Step 1 -> Declare two integers ‘length’, ‘breadth’
   Step 2 -> Print area(length,breadth)
   Step 3 -> Print perimeter(length, breadth);
STOP

#include<stdio.h>
//function to calculate area
int area(int a, int b) {
   int area = a * b;
   return area;
}
//function to calculate perimeter
int perimeter(int a, int b){
   int perimeter = 2*(a + b);
   return perimeter;
}
int main(){
   int length= 20;
   int breadth = 30;
   printf("area of rectangle is : %d</p><p>",area(length,breadth));
   printf("perimeter of rectangle is : %d",perimeter(length, breadth));
   return 0;
}

area of rectangle is : 600
perimeter of rectangle is : 100