update README and all 20 miscellaneous

Author: webwithaman

20_miscellaneous_programs/get_only_certain_data.c.c

@@ -0,0 +1,124 @@
+#include <stdio.h>
+#include <conio.h>
+#include <math.h>
+#include <string.h>
+
+// double getOnlyRealNumber();
+// double stringToDouble(char *);
+
+// long long int getOnlyInteger();
+// long long int stringToInt(char *);
+
+int main()
+{
+    // Get Only Real Number
+    // printf("Enter A Number => ");
+    // printf("\nEntered Number %lf", getOnlyRealNumber());
+
+    // Get Only Integer
+    // printf("Enter A Number => ");
+    // printf("\nEntered Number %lld", getOnlyInteger());
+
+    getch();
+    return 0;
+}
+
+// double getOnlyRealNumber()
+// {
+//     char str[30];
+//     int i = 0;
+//     while (1)
+//     {
+//         char ch = getch();
+//         if (ch == ' ' || ch == 13)
+//             break;
+//         else if ((ch >= '0' && ch <= '9' || ch == '.') || ch == '-' && i == 0)
+//         {
+//             putch(ch);
+//             str[i] = ch;
+//             i++;
+//         }
+//         else if (ch == 8 && i > 0)
+//         {
+//             i--;
+//             putch('\b');
+//             putch(' ');
+//             putch('\b');
+//         }
+//     }
+//     str[i] = 0;
+//     return stringToDouble(str);
+// }
+
+// double stringToDouble(char *str)
+// {
+//     long long int integeralPart = 0, decimalPart = 0;
+//     int i = 0;
+//     if (str[0] == '-')
+//         i = 1;
+//     for (; str[i] != '.' && str[i]; i++)
+//         integeralPart = integeralPart * 10 + (str[i] - 48);
+
+//     if (strlen(str) != i)
+//     {
+//         for (i++; str[i]; i++)
+//             decimalPart = decimalPart * 10 + (str[i] - 48);
+//     }
+
+//     int countDigits = 0, copyDecimalPart = decimalPart;
+//     while (copyDecimalPart > 0)
+//     {
+//         countDigits++;
+//         copyDecimalPart /= 10;
+//     }
+//     double digitsAfterPoint = 0;
+//     if (countDigits)
+//         digitsAfterPoint = decimalPart / pow(10, countDigits);
+// 
+//     double num = integeralPart;
+//     num += digitsAfterPoint;
+//     if (str[0] == '-')
+//         num = -num;
+//     return num;
+// }
+
+// long long int getOnlyInteger()
+// {
+//     char str[30];
+//     int i = 0;
+//     while (1)
+//     {
+//         char ch = getch();
+//         if (ch == ' ' || ch == 13)
+//             break;
+//         else if (ch >= '0' && ch <= '9' || ch == '-' && i == 0)
+//         {
+//             putch(ch);
+//             str[i] = ch;
+//             i++;
+//         }
+//         else if (ch == 8 && i > 0)
+//         {
+//             i--;
+//             putch('\b');
+//             putch(' ');
+//             putch('\b');
+//         }
+//     }
+//     str[i] = 0;
+//     return (stringToInt(str));
+// }
+
+// long long int stringToInt(char *str)
+// {
+//     long long int integeralPart = 0;
+//     int i = 0;
+//     if (str[0] == '-')
+//         i = 1;
+//     for (; str[i]; i++)
+//         integeralPart = integeralPart * 10 + (str[i] - 48);
+
+//     if (str[0] == '-')
+//         integeralPart = -integeralPart;
+//     return integeralPart;
+// }

README.md

@@ -25,6 +25,7 @@ The repository is structured based on different topics, with each topic having i
 - /17_pointers
 - /18_structure
 - /19_dynamic_memory_allocation
+- /20_miscellaneous_programs
 
 ## Clone this Repository