my calculator program

#include //for stndr input #include main() { while(1) //for continuous value print { int choice,a,b,s,p,r,t,v; //variables printf("\n1.addition"); printf("\n2.subtraction"); printf("\n3.multiplication"); printf("\n4.find odd-even"); printf("\n5.division"); printf("\n6.compund instrest"); printf("\n7.exit\n"); printf("\nenter your choice\n\n"); scanf("%d",&choice); switch(choice) //switch case { case 1: //case declear printf("\nenter your numbers\n"); scanf("%d%d",&a,&b); s=a+b; printf("\nsum of %d\n",s); //output value of 1st case break; case 2: printf("\n enter your numbers\n"); scanf("%d%d",&a,&b); s=a-b; //defind case printf("\n value is %d\n",s); break; //break is also important for switch case case 3: printf("enter your two numbers\n") ; scanf("%d%d",&a,&b); s=a*b; printf("multiplication of %d",s); break; case 4: printf("enter a number\n"); scanf("%d",&a); if(a%2==0) printf("number is even\n"); else printf("number is odd\n"); break; case 5: printf("\nenter your first division number then by divisible\n"); scanf("%d%d",&a,&b); s=a/b; printf("value is %d\n",s); break; case 6: printf("enter your values\nprincipal\nrate\ntime\n"); scanf("%d%d%d",&p,&r,&t); v=(p*r*t)/100; printf("value is %d\n",v); getch(); case 7: //exit case printf("press enter to exit\n"); exit(0); break; default: //default value is also important printf("invalid choice"); break; getch(); //for hold the screen/display }} }

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