3. Simple computer program (C language)

Simple computer program code:

/*2017 June 30 15:35:14 function: Calculator program, input two operand and arithmetic character, output calculation result */# include <stdio.h>int main (void) {float A, b; char x; Step1: printf ("Please enter the two number to be calculated, the middle is +-*/operator \ n");  scanf ("%f%c%f", &a, &x, &b); Switch (x) {case  ' + ': printf ("%.2f%c%.2f =%.2f\n", a, X, B, a+b);  Case '-': printf ("%.2f%c%.2f =%.2f\n", a, X, B, A-a);  Case ' * ': printf ("%.2f%c%.2f =%.2f\n", a, X, B, a*b);  Case '/': printf ("%.2f%c%.2f =%.2f\n", a, X, B, A/b); } goto Step1; return 0;} /* Results shown in vc++6.0:----------------Please enter the two number to be calculated, the middle is +-*/operator 5*12.65.00 * 12.60 = 63.00----------------*/

　　

3. Simple computer program (C language)