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- #include <stdio.h>
- #include <stdlib.h>
- #include <math.h>
- float areaOfSquare (int a) {
- float result;
- result=a*a;
- return result;
- }
- float areaOfRectangle (int x,int y) {
- float result1;
- result1=x*y;
- return result1;
- }
- float areaOfTriangle (int b,int c) {
- float result2;
- result2=b*c/2;
- return result2;
- }
- float areaOfCircle (float radius) {
- float result3;
- result3=radius*radius*M_PI;
- return result3;
- }
- int main () {
- int number,a,x,y,b,c;
- float radius,area;
- printf("Enter number: ");
- scanf("%d",&number);
- if (number==1) {
- printf("a= ");
- scanf("%d",&a);
- area=areaOfSquare (a);
- printf("area:%.2f\n",area);
- }
- if (number==2) {
- printf("x= ");
- scanf("%d",&x);
- printf("y= ");
- scanf("%d",&y);
- area=areaOfRectangle (x,y);
- printf("area:%.2f\n",area);
- }
- if (number==3) {
- printf("b= ");
- scanf("%d",&b);
- printf("c= ");
- scanf("%d",&c);
- area=areaOfTriangle (b,c);
- printf("area:%.2f\n",area);
- }
- if (number==4) {
- printf("radius= ");
- scanf("%f",&radius);
- area=areaOfCircle (radius);
- printf("area:%.2f\n",area);
- }
- return 0;
- }
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