creazione ps e png per file

#include <stdio.h>




main(){

    FILE *fp;


fp=fopen("dati_png.gnu","w");
fprintf(fp, " plot 'dteul.dat' u 1:2 \n set xlabel 'gittata massima' \n set ylabel 'dt' \n set term png \n set output 'eull.png' \n replot \n  \n ");
fclose(fp);
system("gnuplot dati_png.gnu");
fp=fopen("dati_ps.gnu","w");
fprintf(fp, " plot 'dteul.dat' u 1:2 \n set xlabel 'gittata massima' \n set ylabel 'dt' \n set term post col \n set output 'eull.ps' \n replot \n  \n ");
fclose(fp);
system("gnuplot dati_ps.gnu");
system("rm dati_ps.gnu");
system("rm dati_png.gnu");


}