luc098.c (2002B)
1 /* 2 * Author : Amit Dutta <amitdutta4255@gmail.com> 3 * Date : 08 Feb 2026 4 * Repo : https://github.com/notamitgamer/bsc 5 * License : MIT License (See the LICENSE file for details) 6 */ 7 8 /* Write a calculator utility using command line arguments.\nUsage: calc <switch> <n> <m>\nwhere switch is arithmetic operator or comparison operator. 9 */ 10 /* Let Us C, Chap- 20 (More Issues In Input/Output), Qn No.: A(d) */ 11 12 /* This file is auto-generated by a bot. */ 13 /* This code is not compiled; it is for reference only. */ 14 15 16 #include <stdio.h> 17 #include <stdlib.h> 18 #include <string.h> 19 #include <ctype.h> 20 21 int main(int argc, char *argv[]) 22 { 23 float n, m, res; 24 char operator; 25 26 if (argc != 4) 27 { 28 printf("Usage: %s <switch> <n> <m>\n", argv[0]); 29 printf("Example: %s + 10 20\n", argv[0]); 30 printf("Note: For multiplication (*), use '*' or x to avoid shell expansion.\n"); 31 exit(1); 32 } 33 34 operator = argv[1][0]; // First character of the switch argument 35 n = atof(argv[2]); 36 m = atof(argv[3]); 37 38 switch (operator) 39 { 40 // Arithmetic 41 case '+': 42 printf("%.2f\n", n + m); 43 break; 44 case '-': 45 printf("%.2f\n", n - m); 46 break; 47 case 'x': 48 case '*': 49 printf("%.2f\n", n * m); 50 break; 51 case '/': 52 if (m == 0) printf("Error: Division by zero\n"); 53 else printf("%.2f\n", n / m); 54 break; 55 case '%': 56 printf("%d\n", (int)n % (int)m); 57 break; 58 59 // Comparison 60 case '<': 61 printf("%s\n", (n < m) ? "True" : "False"); 62 break; 63 case '>': 64 printf("%s\n", (n > m) ? "True" : "False"); 65 break; 66 67 // Handling symbols that might be multi-char (e.g. <=, >=, ==) is tricky 68 // with argv[1][0], but basic logic for typical single char switches: 69 case '=': 70 printf("%s\n", (n == m) ? "True" : "False"); 71 break; 72 73 default: 74 printf("Unknown operator: %c\n", operator); 75 break; 76 } 77 78 return 0; 79 }