feat: Initial commit

Laboratorio 1/calcolatricefile.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+int main()
+{
+
+    FILE *fp_read, *fp_write;
+    char operation;
+    float op1, op2, res;
+
+    if ((fp_read = fopen("./Operations.txt", "r")) == NULL)
+    {
+        printf("Error opening file\n");
+        return 1;
+    }
+    if ((fp_write = fopen("./Results.txt", "w")) == NULL)
+    {
+        printf("Error opening file\n");
+        return 2;
+    }
+
+    while (!feof(fp_read))
+    {
+        fscanf(fp_read, " %c %f %f", &operation, &op1, &op2);
+        if (!feof(fp_read))
+        {
+            switch (operation)
+            {
+            case '+':
+                res = op1 + op2;
+                break;
+
+            case '-':
+                res = op1 - op2;
+                break;
+
+            case '*':
+                res = op1 * op2;
+                break;
+
+            case '/':
+                if (op2 == 0)
+                {
+                    printf("Error: divide by zero\n");
+                    return 3;
+                }
+                res = op1 / op2;
+                break;
+
+            default:
+                printf("Error: invalid operation\n");
+                return 1;
+            }
+
+            fprintf(fp_write, "%c %.2f\n", operation, res);
+        }
+    }
+
+    fclose(fp_read);
+    fclose(fp_write);
+
+    return 0;
+}