/* * File: signtest.c * ---------------- * Reads in a number and classifies it according to its sign. */ #include #include "genlib.h" #include "simpio.h" main() { int n; printf("Program to classify a number by its sign.\n"); printf("n = ? "); n = GetInteger(); if (n > 0) { printf("That number is positive.\n"); } else if (n == 0) { printf("That number is zero.\n"); } else { printf("That number is negative.\n"); } } --------------------------------------------------------------- lassie% a.out Program to classify a number by its sign. n = ? 20 That number is positive. lassie% a.out Program to classify a number by its sign. n = ? 0 That number is zero. lassie% a.out Program to classify a number by its sign. n = ? -9 That number is negative.