conway's game of life

#include <stdio.h>
#define L 50
#define t_max 100


int somma(int x,int y); //somma caselle adiacenti
int c[L][L];
int c1[L][L];

int main(){
int x, y, n, somm, t;
FILE *fp, *fd;
fp=fopen("vita.dat","w");
fd=fopen("vita.gnu","w");
fprintf(fd, "set size square \n set view map \n plot 'vita.dat' u 1:2");
fclose(fd);

for(x=0;x<L+1;x++){     //azzero array
for(y=0;y<L+1;y++){
    if(x%%)
    c[x][y]=0;
    c1[x][y]=0;
}
}
c[L/2+5][L/2+1]=1;
c[L/2+4][L/2+1]=1;
c[L/2+5][L/2-1]=1;
c[L/2+4][L/2-1]=1;
c[L/2+6][L/2]=1;
c[L/2+3][L/2]=1;
c[L/2+1][L/2]=1;
c[L/2+1][L/2]=1;
c[L/2+1][L/2+1]=1;
c[L/2][L/2]=1;
c[L/2][L/2+1]=1;




for(t=0;t<t_max;t++){
    for(x=1;x<L-1;x++){ //stampo
    for(y=1;y<L-1;y++){
        if(c[x][y]==1){fprintf(fp,"%d %d %d\n",x,y,t);}

    }
    }

    for(x=1;x<L-1;x++){
    for(y=1;y<L-1;y++){
        somm=somma(x,y);    //vedo quanto vale la somma delle celle adiacenti
        if(somm==3 && c[x][y]==0){ //giusta popolazione--->nascita
            c1[x][y]=1;
        }else if(somm!=3 && c[x][y]==0){c1[x][y]=0;}
        if((somm==2||somm==3) && c[x][y]==1){ //sovra o sottopopolazione--->morte
            c1[x][y]=1;
        }else if((somm!=2&&somm!=3) && c[x][y]==1){c1[x][y]=0;}
    }
    }
    for(x=1;x<L-1;x++){ //sostituzione
    for(y=1;y<L-1;y++){
        c[x][y]=c1[x][y];
    }
    }
}
system("gnuplot vita.gnu");
}

int somma(int x,int y){
    int somma;
    somma=c[x][y+1]+c[x][y-1]+c[x-1][y]+c[x-1][y-1]+c[x-1][y+1]+c[x+1][y]+c[x+1][y-1]+c[x+1][y+1];
    return somma;
}