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Showing posts from August 24, 2012

program to make a menu driven and reusable calculator

LIST OF PROGRAMS #include<stdio.h> #include<conio.h> #include<math.h> void main() { long int i=1,a,b,c=0,choice=1; clrscr(); do { switch(i) { case 1: { printf("enter numbers\n"); scanf("%ld%ld",&a,&b); printf("enter 1 for add\n"); printf("enter 2 for subtract\n"); printf("enter 3 for multiply\n"); printf("enter 4 for divide\n"); printf("enter 5 for modulus\n"); printf("enter choice\n"); scanf("%d",&choice); switch(choice) { case 1:c=a+b; break; case 2:c=a-b; break; case 3:c=a*b; break; case 4:c=a/b; break; case 5:c=a%b; break; default:printf("wrong input\n"); break; } if(choice>0&&choice<6) printf("%ld",c); break; } } printf(" enter 1 for re using calculator\n"); printf(" enter other number for exit\n"); scanf("%ld",&i); }while(i==1);  printf("t