mee4

#include <stdio.h>
#include <stdint.h>

 int add( int a, int b ) {
     return a + b;
 }

 int sub( int a, int b ) {
     return a - b;
 }

 int mul( int a, int b ) {
     return a * b;
 }

 int or( int a, int b ) {
     return a | b;
 }

 int and( int a, int b ) {
     return a & b;
 }

 int xor( int a, int b ) {
     return a ^ b;
 }

typedef int ( *op_ptr )( int, int );

typedef struct {
 char name[11];
 op_ptr func;
} op;


int main()
{
    int a, b;
    uint8_t sel;

    op ops[] = {
     { name: "Add", func: &add },
     { name: "Sub", func: &sub },
     { name: "Mul", func: &mul },
     { name: "OR" , func: &or  },
     { name: "AND", func: &and },
     { name: "XOR", func: &xor }
    };

    for ( uint8_t i = 0; i < 6; i++ ) {
        printf( "%hhu. %s\n", i, ops[i].name );
    }
    printf( "\nSelection: " );
    scanf( "%hhu", &sel );
    getchar();
    printf( "a=" );
    scanf( "%d", &a );
    getchar();
    printf( "b=" );
    scanf( "%d", &b );
    getchar();

    if ( sel < 6 )
        printf( "result: %d\n", ops[sel].func( a, b ) );
    else
        printf( "No Action" );

    return 0;
}