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#include <stdio.h>
 
int main(void) {
	int i;
	int a,b,c;
	printf("Enter the value of a and b is %d %d",&a, &b);
	scanf("%d%d",&a&b);
	printf("enter your choice");
	scanf("%d", & i);
	switch(i)
	{
	 case1: Addition
	  c=a+b;
	  printf("addition is %d \n",c);
	  break;
	 case2: subtracion
	  c=a-b;
	  printf("subtracion is %d\n",c);
	  break;
	 case3:multiplication
	  c=a*b;
	  printf("multiplication is %d\n",c);
	  break;
	 case4: division
	  c=a/b;
	  printf("division is%d\n",c);
	  break;
    case5: default
     printf("invalide input");
}
 
 
 
	return 0;
}
 

prog.c: In function 'main':
prog.c:6:9: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int *' [-Wformat=]
  printf("Enter the value of a and b is %d %d",&a, &b);
         ^
prog.c:6:9: warning: format '%d' expects argument of type 'int', but argument 3 has type 'int *' [-Wformat=]
prog.c:7:17: error: invalid operands to binary & (have 'int *' and 'int')
  scanf("%d%d",&a&b);
                 ^
prog.c:12:10: error: a label can only be part of a statement and a declaration is not a statement
   case1: Addition
          ^
prog.c:12:10: error: unknown type name 'Addition'
prog.c:16:10: error: a label can only be part of a statement and a declaration is not a statement
   case2: subtracion
          ^
prog.c:16:10: error: unknown type name 'subtracion'
prog.c:17:4: error: redefinition of 'c'
    c=a-b;
    ^
prog.c:13:4: note: previous definition of 'c' was here
    c=a+b;
    ^
prog.c:20:9: error: a label can only be part of a statement and a declaration is not a statement
   case3:multiplication
         ^
prog.c:20:9: error: unknown type name 'multiplication'
prog.c:21:4: error: redefinition of 'c'
    c=a*b;
    ^
prog.c:17:4: note: previous definition of 'c' was here
    c=a-b;
    ^
prog.c:24:10: error: a label can only be part of a statement and a declaration is not a statement
   case4: division
          ^
prog.c:24:10: error: unknown type name 'division'
prog.c:25:4: error: redefinition of 'c'
    c=a/b;
    ^
prog.c:21:4: note: previous definition of 'c' was here
    c=a*b;
    ^
prog.c:29:6: error: expected ':' before 'printf'
      printf("invalide input");
      ^
prog.c:28:5: warning: label 'case5' defined but not used [-Wunused-label]
     case5: default
     ^
prog.c:24:3: warning: label 'case4' defined but not used [-Wunused-label]
   case4: division
   ^
prog.c:20:3: warning: label 'case3' defined but not used [-Wunused-label]
   case3:multiplication
   ^
prog.c:16:3: warning: label 'case2' defined but not used [-Wunused-label]
   case2: subtracion
   ^
prog.c:12:3: warning: label 'case1' defined but not used [-Wunused-label]
   case1: Addition
   ^
prog.c:5:10: warning: unused variable 'c' [-Wunused-variable]
  int a,b,c;
          ^

Standard output is empty