im new with c and im taking a class and need this done by tomorrow, can sombody tell me whats wrong? #include main () { float area; int valx, valy; char shape; printf("This program will calculate the area of a shape\n"); printf("Press C for circle, S for square, R for rectangle and T for triangle:"); scanf("%c" ,&shape); fflush(stdin); shape=toupper(shape); if(shape=='C') { printf("Enter the Radius of the circle:"); scanf("%d",&valx); area = valx*3.14; printf("The area of a circle with a radius of is:%9.2f\n",&area); } else if(shape=='S') { printf("Enter the length of a side of the square:"); scanf("%d",&valx); area = valx*valx; printf("The area of a square when one side has a length of %f is %9.2f\n", &valx, &area); } else if(shape=='R') { printf("Enter the length and height of the rectangle:"); scanf("%d%d",&valx,valy); area = valx*valy; printf("The area of the rectangle with a length of %f and width of %f is %9.f\n",&valx,&valy,&area); } else if(shape=='T') { printf("Enter the base and heigth of the triangle:"); scanf("%d%d"); valx,valy; area=valx*valy/2; printf("The area of a triangle with %f as the base and %f as the height is %9.f\n",&valx,&valy,&area); } else printf("Wrong letter!\n"); return(0); }

When you are printing the area using printf, don't use &area or &valx. Use &valx in scanf calls.

missed in my earlier response, the printf statements should look like : printf("The area of a square when one side has a length of %f is %9.2f\n", valx, area);

---------------- //area = valx*3.14; area = 3.14 * valx * valx; // or, with math.h, you can use: area = 3.14 * pow(valx, 2); // printf("The area of a circle with a radius of is:%9.2f\n",&area); // missed one specifier %d // &area will print out the address in memory where 'area' is stored // instead of your desired variable 'area' printf("The area of a circle with a radius of %d is: %.2f", valx, area); // printf("The area of a square when one side has a length of %f is %9.2f\n", &valx, &area); // use %d specifier because valx is declared as int printf("The area of a square when one side has a length of %d is %.2\n", valx, area); // if you want to view valx as floating point notation: printf("The area of a square when one side has a length of %f is %.2f\n", (float)valx, area); // this seems pointless however, since your entering intergers //scanf("%d%d",&valx,valy); scanf("%d %d", &valx, &valy); // you need to pass the address of the variable 'valy' // when using scanf() //printf("The area of the rectangle with a length of %f and width of %f is %9.f\n",&valx,&valy,&area); printf("The area of the rectangle with a length of %d and width of %d is %f\n", valx, valy, area); //printf("The area of a triangle with %f as the base and %f as the height is %9.f\n",&valx,&valy,&area); printf("The area of a triangle with %d as the base and %d as the height is %f\n", valx, valy, area);