PB 13.3

//13.3
//main.cpp

#include <stdio.h>
#include <cstdlib>
#include <string.h>

int comp(char *s)
{
    if(strcmp(s, "lconst")==0)
        return 1;
    if(strcmp(s, "add")==0)
        return 2;
    if(strcmp(s, "mul")==0)
        return 3;
    if(strcmp(s, "div")==0)
        return 4;
    if(strcmp(s, "print")==0)
        return 5;
    return 0;
}

int main()
{
    int i, n, dim=16;
    int *v;

    v=(int*) malloc(dim * sizeof(int));

    scanf("%d", &n);

    for(int i=1; i<=n; i++)
    {
        char *s;
        int dst, src0, src, val, reg;
        s=(char*) malloc (7 * sizeof(char));

        scanf("%s%[ ]", s);
        switch (comp(s))
        {
            case 1:
                scanf("%d%d", &dst, &val);
                v[dst]=val;
                break;

            case 2:
                scanf("%d%d%d", &dst, &src0, &src);
                v[dst]=v[src]+v[src0];
                break;

            case 3:
                scanf("%d%d%d", &dst, &src0, &src);
                v[dst]=v[src0]*v[src];
                break;

            case 4:
                scanf("%d%d%d", &dst, &src0, &src);
                if(v[src]==0)
                {
                    printf("Exception: line %d\n", i);
                    i=n;
                }
                else
                    v[dst]=v[src0]/v[src];
                break;

            case 5:
                scanf("%d", &reg);
                printf("%d\n", v[reg]);
                break;

            default:
            break;
        }
    }
}