{"id":1068,"date":"2025-11-21T08:54:48","date_gmt":"2025-11-21T03:24:48","guid":{"rendered":"https:\/\/codexplained.in\/?p=1068"},"modified":"2025-11-21T08:54:48","modified_gmt":"2025-11-21T03:24:48","slug":"simple-calculator-using-switch-case-2","status":"publish","type":"post","link":"https:\/\/codexplained.in\/?p=1068","title":{"rendered":"Simple Calculator using Switch Case:"},"content":{"rendered":"\n

include<\/h1>\n\n\n\n

int main() {
char operation;
float num1, num2, result;<\/p>\n\n\n

\n\/\/ User input\nprintf("Enter first number: ");\nscanf("%f", &num1);\nprintf("Enter second number: ");\nscanf("%f", &num2);\nprintf("Enter operation (+, -, *, \/): ");\nscanf(" %c", &operation); \/\/ Notice the space before %c to consume any whitespace\n\n\/\/ Switch-case for operations\nswitch (operation) {\n    case '+':\n        result = num1 + num2;\n        printf("Result: %.2f + %.2f = %.2f\\n", num1, num2, result);\n        break;\n    case '-':\n        result = num1 - num2;\n        printf("Result: %.2f - %.2f = %.2f\\n", num1, num2, result);\n        break;\n    case '*':\n        result = num1 * num2;\n        printf("Result: %.2f * %.2f = %.2f\\n", num1, num2, result);\n        break;\n    case '\/':\n        if (num2 != 0) {\n            result = num1 \/ num2;\n            printf("Result: %.2f \/ %.2f = %.2f\\n", num1, num2, result);\n        } else {\n            printf("Error: Division by zero!\\n");\n        }\n        break;\n    default:\n        printf("Error: Invalid operation!\\n");\n        break;\n}\n\nreturn 0;\n<\/pre><\/div>\n\n\n
}<\/p>\n\n\n\n
Explanation :<\/h3>\n\n\n\n
    \n
  1. Input Section<\/strong>:\n
      \n
    • The program prompts the user to enter two numbers and the desired operation.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Switch-Case Structure<\/strong>:\n
        \n
      • The switch<\/code> statement checks the operation input by the user.<\/li>\n\n\n\n
      • Each case corresponds to an arithmetic operation:\n
          \n
        • Addition<\/strong>: For +<\/code>, it adds the two numbers.<\/li>\n\n\n\n
        • Subtraction<\/strong>: For -<\/code>, it subtracts the second number from the first.<\/li>\n\n\n\n
        • Multiplication<\/strong>: For *<\/code>, it multiplies the two numbers.<\/li>\n\n\n\n
        • Division<\/strong>: For \/<\/code>, it checks for division by zero before performing the operation.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • Output<\/strong>:\n
            \n
          • The result is printed in a formatted manner using printf<\/code>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
            Examples :<\/h3>\n\n\n\n
              \n
            • Example 1<\/strong>:\n
                \n
              • Input: num1 = 10<\/code>, num2 = 5<\/code>, operation = '+'<\/code><\/li>\n\n\n\n
              • Output: Result: 10.00 + 5.00 = 15.00<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n
              • Example 2<\/strong>:\n
                  \n
                • Input: num1 = 10<\/code>, num2 = 5<\/code>, operation = '-'<\/code><\/li>\n\n\n\n
                • Output: Result: 10.00 - 5.00 = 5.00<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n