Add file to treat params

Signed-off-by: Cristian Weiland <cw14@inf.ufpr.br>

interface.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#define ARGS_NUM 9
+
+double Hx,Hy;
+int MaxIter;
+FILE *fp;
+
+void print_errno(void) {
+    printf("%s",strerror(errno));
+}
+
+void getParams(int argc, char* argv[]) {
+    if(argc != ARGS_NUM) {
+        fprintf(stderr,"Wrong number of arguments.\n");
+        exit(-1);
+    }
+    int i;
+    for(i=1; i<ARGS_NUM; i+=2) {
+        if(strcmp(argv[i],"-hx") == 0) {
+            Hx = atof(argv[i+1]);
+        } else if(strcmp(argv[i],"-hy") == 0) {
+            Hy = atof(argv[i+1]);
+        } else if(strcmp(argv[i],"-i") == 0) {
+            MaxIter = atoi(argv[i+1]);
+        } else if(strcmp(argv[i],"-o") == 0) {
+            fp = fopen(argv[i+1],"w");
+        } else {
+            fprintf(stderr,"Incorrect parameter.\n");
+            exit(-1);
+        }
+    }
+}
+
+int main(int argc, char* argv[]) {
+    getParams(argc,argv);
+}
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