Question

GCC keeps telling me:

expected ‘)’ before ‘;’ token,
expected primary-expression before ‘)’ token
expected ‘;’ before ‘)’ token

And I could not find the problem. Here is the function that have the problem:

void prim(){
    prepararEstructuras();
    int min,k;  
    for(int i=1;i<nnodos;i++){
        min = menorCoste[1];
        k = 1;
        for(int j=2;i<nnodos;j++)
            if(menorCoste[j] < min){
                min = menorCoste[j];
                k = j;
            }
        solucion[k][masCercano[k]] = G[k][masCercano[k]];
        menorCoste[k] = infinito;
        for(int j=1;j<nnodos;j++)
            if(G[k][j] < menorCoste[j] && menorCoste[j]!=infinito){
                menorCoste[j] = G[k][j];
                masCercano[j] = k;
            }                   
    }
}

Here is the line that cause the problem:

if(G[k][j] < menorCoste[j] && menorCoste[j]!=infinito){

And here are my variables:

#define MAX_NODOS 20000
#define infinito 10000;

int nnodos;
int nAristas;
int G[MAX_NODOS][MAX_NODOS]; 
int solucion[MAX_NODOS][MAX_NODOS];
int menorCoste[MAX_NODOS];
int masCercano[MAX_NODOS];

Answer 1

You have an extra semicolon in your macro.

#define infinito 10000;
                      ^

Get rid of it.

As it is, your line gets expanded to this:

if(G[k][j] < menorCoste[j] && menorCoste[j]!=10000;){
                                                  ^ does not belong here

Alternatively, don’t use macros at all:

const int MAX_NODOS = 20000;
const int infinito = 10000;