# Write a program to find the area of any triangle

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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 // 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-height\n");     printf("(2)Area of triangle using three sides\n");     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(); }