#include <stdio.h>
 
int main() {
    float basic, da, hra, ta, other_allowance;
    float da_percent, hra_percent, ta_percent;
    float gross;
    int mode;
 
    // Default company percentages (change if needed)
    const float DEF_DA_PCT = 10.0f;   // 10%
    const float DEF_HRA_PCT = 20.0f;  // 20%
    const float DEF_TA_PCT = 5.0f;    // 5%
 
    printf("Gross Salary Calculator\n");
    printf("-----------------------\n");
    printf("Enter Basic Pay: ");
    if (scanf("%f", &basic) != 1) {
        printf("Invalid input. Exiting.\n");
        return 1;
    }
 
    printf("\nChoose input mode:\n");
    printf("1. Use default percentages (DA=10%%, HRA=20%%, TA=5%%)\n");
    printf("2. Enter custom percentages/allowance\n");
    printf("Enter your choice (1 or 2): ");
    if (scanf("%d", &mode) != 1) {
        printf("Invalid input. Exiting.\n");
        return 1;
    }
 
    if (mode == 1) {
        da_percent = DEF_DA_PCT;
        hra_percent = DEF_HRA_PCT;
        ta_percent = DEF_TA_PCT;
        other_allowance = 0.0f; // no extra fixed allowance by default
    } else if (mode == 2) {
        printf("Enter DA percentage (e.g., 10 for 10%%): ");
        scanf("%f", &da_percent);
 
        printf("Enter HRA percentage (e.g., 20 for 20%%): ");
        scanf("%f", &hra_percent);
 
        printf("Enter TA percentage (e.g., 5 for 5%%). Enter 0 if none: ");
        scanf("%f", &ta_percent);
 
        printf("Enter any other fixed allowances (enter 0 if none): ");
        scanf("%f", &other_allowance);
    } else {
        printf("Invalid choice. Exiting.\n");
        return 1;
    }
 
    // Calculate individual components
    da = (da_percent / 100.0f) * basic;
    hra = (hra_percent / 100.0f) * basic;
    ta = (ta_percent / 100.0f) * basic;
 
    // Gross salary = basic + allowances
    gross = basic + da + hra + ta + other_allowance;
 
    // Display breakdown and final gross salary
    printf("\n--- Salary Breakdown ---\n");
    printf("Basic Pay              : %.2f\n", basic);
    printf("Dearness Allowance (%.2f%%): %.2f\n", da_percent, da);
    printf("House Rent Allowance (%.2f%%): %.2f\n", hra_percent, hra);
    printf("Transport Allowance (%.2f%%): %.2f\n", ta_percent, ta);
    if (other_allowance != 0.0f)
        printf("Other Fixed Allowances : %.2f\n", other_allowance);
    printf("-------------------------------\n");
    printf("Gross Salary           : %.2f\n", gross);
 
    return 0;
}