added: no longer accepts when an input is lacking

Implementierung/main.c

@@ -52,7 +52,7 @@ void benchmarking(size_t benchmarking_amount, int version_to_use, float complex
             tricorn_implementation = tricorn_V5;
             break;
         default:
-            printf("Invalid version to use");
+            fprintf(stderr,"Invalid version to use: V%d. Available versions are : V0,V1,V2,V3,V4,V5\n",version_to_use);
             return;
     }
 
@@ -99,6 +99,30 @@ unsigned tests(void) {
     return 0;
 }
 
+void checkInputs(_Bool n,_Bool r,_Bool o,_Bool d,_Bool s) {
+    if (!n)
+    {
+        fprintf(stderr, "ERROR: Input n not given.\n");
+    }
+    if (!r)
+    {
+        fprintf(stderr, "ERROR: Input r not given.\n");
+    }
+    if (!o)
+    {
+        fprintf(stderr, "ERROR: Input o not given.\n");
+    }
+    if (!d)
+    {
+        fprintf(stderr, "ERROR: Input d not given.\n");
+    }
+    if (!s)
+    {
+        fprintf(stderr, "ERROR: Input s not given.\n");
+    }
+    
+}
+
 
 // REMOVE LATER: interesting test command  ./tricorn -s -2.0,0.6 -r 0.0010  -n 200 -d 1920,1080 -o image.bmp  -C
 // AND FOR NEGATIVE HEIGHT: ./tricorn -s -2,-0.5 -r 0.0010  -n 200 -d 1920,-1080 -o image.bmp  -C 
@@ -171,6 +195,12 @@ int main(int argc, char** argv)
     _Bool will_benchmark = false; // actual initial value
     _Bool will_test = false;
 
+
+    _Bool nGiven = false;
+    _Bool rGiven = false;
+    _Bool oGiven = false;
+    _Bool dGiven = false;
+    _Bool sGiven = false;
     int amount_function_called = -1; // initial values, so that the compiler doesn't complain
     unsigned n = 0;
     float starting_point_real = -1;
@@ -189,7 +219,11 @@ int main(int argc, char** argv)
         {
         case 'V': // done, function needed
             version_to_use = strtol(optarg,NULL,10);
-
+            if (version_to_use < 0 || version_to_use > 5)
+            {
+                fprintf(stderr,"Invalid version to use: V%d. Available versions are : V0,V1,V2,V3,V4,V5\n", version_to_use);
+                return EXIT_FAILURE;
+            }
             printf("version is %d\n", version_to_use);
             // call different version functions
 
@@ -202,7 +236,7 @@ int main(int argc, char** argv)
             // wird die Laufzeit der angegebenen Implementierung gemessen und ausgegeben (do this later)
             amount_function_called = strtol(optarg,NULL,10);
             if (amount_function_called <= 0) {
-                printf("Invalid benchmarking input, the value should be greater than 0\n");
+                fprintf(stderr, "Invalid benchmarking input, the value should be greater than 0\n");
                 return 1;
             }
             will_benchmark = true;
@@ -213,6 +247,7 @@ int main(int argc, char** argv)
             break;
 
         case 's': {
+            sGiven = true;
             char *imaginary_string;
             char *end;
 
@@ -238,6 +273,7 @@ int main(int argc, char** argv)
         }
             
         case 'd': {
+            dGiven = true;
             char* height_string;
             char *end;
             width = strtol(optarg,&height_string,10);
@@ -261,12 +297,14 @@ int main(int argc, char** argv)
         }
 
         case 'n':
+            nGiven = true;
             n = strtol(optarg,NULL,10);
             printf("n:%d\n",n);
             // -n <Zahl> —MaximaleAnzahlanIterationen pro Bildpixel 
             break;
 
         case 'r': {
+            rGiven = true;
             char *end;
             resolution = strtof(optarg,&end);
             if (end == optarg || *end != '\0') 
@@ -280,6 +318,7 @@ int main(int argc, char** argv)
         }
 
         case 'o':
+            oGiven = true;
             output_data = malloc(strlen(optarg) + 1);
             strcpy(output_data,optarg);
             printf("output data: %s\n", output_data); // test
@@ -331,6 +370,12 @@ int main(int argc, char** argv)
         return tests() ? EXIT_FAILURE : EXIT_SUCCESS;
     }
 
+    if (!(nGiven && rGiven && oGiven && dGiven && sGiven))
+    {
+        checkInputs(nGiven,rGiven,oGiven,dGiven,sGiven);
+        return EXIT_FAILURE;
+    }
+
     if (will_benchmark)
     {   
         printf("\nDoing benchmarking. No images will be created\n");