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// Write a program to find the area of triangle
// Ex: opt:1,base:3,height:4->Area:6; opt:2,a:2,b:3;c:4->Area:2.90
// Author: AimForJob.com
#include
#include
int main(){
int opt;
double area;
printf(“(1)Area of triangle using base-heightn”);
printf(“(2)Area of triangle using three sidesn”);
printf(“Please select your choice:”);
scanf(“%d”,&opt);
while(opt<=0){
printf(“Please select either 1 or 2:”);
scanf(“%d”,&opt);
}
if(opt==1){
double b,h;
printf(“Enter the Base of triangle:”);
scanf(“%lf”,&b);
while(b<=0){
printf(“Base of triangle can’t be negative or zero”);
printf(“Enter the Base of triangle:”);
scanf(“%lf”,&b);
}
printf(“Enter the height of triangle:”);
scanf(“%lf”,&h);
while(b<=0){
printf(“Height of triangle can’t be negative or zero”);
printf(“Enter the height of triangle:”);
scanf(“%lf”,&h);
}
area = (b*h)/2.0;
}
else if(opt==2){
double a,b,c,s;
printf(“Enter the triangle side1:”);
scanf(“%lf”,&a);
while(a<=0){
printf(“Side of triangle can’t be negative or zero”);
printf(“Enter the triangle side1:”);
scanf(“%lf”,&a);
}
printf(“Enter the triangle side2:”);
scanf(“%lf”,&b);
while(b<=0){
printf(“Side of triangle can’t be negative or zero”);
printf(“Enter the triangle side2:”);
scanf(“%lf”,&b);
}
printf(“Enter the triangle side3:”);
scanf(“%lf”,&c);
while(c<=0){
printf(“Side of triangle can’t be negative or zero”);
printf(“Enter the triangle side3:”);
scanf(“%lf”,&c);
}
s = (a+b+c)/2.0;
area = sqrt(s*(s-a)*(s-b)*(s-c));
}
printf(“Area of triangle: %lf”,area);
getch();
}
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