Hello all, first post (well second really but the first never materialized on the board).
I want to have calculations take place inside a switch statement that calls the appropriate function. The menu portion of the program works well, but I can't figure out how to let the user actually input 2 different numbers to the functions. My questions are:
1. If I use scanf to assign values to the variables, what determines end of input to each variable? (ie.. scanf("%d%d", &a, &b) what is the end of a, what is the end of b?)
2. Should I assign the variables to user input inside the switch, or try to do it in the functions below?
3. Is there something I haven't thought to ask that will screw me over? I'm really new to this.
p.s. This really was a test of multilayer menu, but I want to add functionality if I can. Thanks for any help!Code:#include<stdio.h> int add(int b, int a); int mult(int b, int a); main() { int preass1, preass2, a, c; /*want preass1, and 2 to both be user input, stands for preassigned*/ printf("Press [1] for Addition, or Multiplication"); while ((c=getchar()) !=EOF) { if (c=='0' || c<='9' && c>='3'){ printf("didn't enter menu"); } /*for when you can't get into the main menu of calculator*/ else if (c=='1') { printf("Hit 1 for addition \nHit 2 for multiply\n"); scanf("%d", &a); switch (a) { case 1: printf("%d", add(preass1,preass2)); break; case 2: printf("%d", mult(preass1,preass2)); break; default: printf("Ruh Roh\n"); } /*end switch, end of menu for calculator*/ } /*end else if*/ } /*end while*/ return 0; } int add(int a, int b) { a=5; /*should I assign user input to variables here, or above?*/ b=10; return a + b; } int mult(int a, int b) { a=5; b=10; return a * b; }
edit: Changed a variable before posting and didn't change all the conditions testing it.
Originally Posted by Alpo
