c语言实现多功能计算器进行四则运算，阶乘，矩阵，平方根，求幂，进制转换等其他运算，可以复位，报错，退出，运算式子从文件输入程序，程序运算后再将答案输入文件

C语言可以实现一个多功能计算器，可以进行四则运算、阶乘、矩阵运算、平方根、求幂、进制转换等其他运算。下面是一个简单的示例代码：

#include <stdio.h>
#include <math.h>

// 四则运算函数
double add(double a, double b) {
    return a + b;
}

double subtract(double a, double b) {
    return a - b;
}

double multiply(double a, double b) {
    return a * b;
}

double divide(double a, double b) {
    if (b != 0) {
        return a / b;
    } else {
        printf("Error: Division by zero!\n");
        return 0;
    }
}

// 阶乘函数
int factorial(int n) {
    if (n == 0 || n == 1) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
}

// 平方根函数
double squareRoot(double num) {
    if (num >= 0) {
        return sqrt(num);
    } else {
        printf("Error: Invalid input for square root!\n");
        return 0;
    }
}

// 求幂函数
double power(double base, double exponent) {
    return pow(base, exponent);
}

// 进制转换函数
void decimalToBinary(int decimal) {
    int binary[32];
    int i = 0;

    while (decimal > 0) {
        binary[i] = decimal % 2;
        decimal = decimal / 2;
        i++;
    }

    printf("Binary: ");
    for (int j = i - 1; j >= 0; j--) {
        printf("%d", binary[j]);
    }
    printf("\n");
}

int main() {
    int choice;
    double num1, num2;
    int num;
    char operator;

    while (1) {
        printf("1. Add\n");
        printf("2. Subtract\n");
        printf("3. Multiply\n");
        printf("4. Divide\n");
        printf("5. Factorial\n");
        printf("6. Square Root\n");
        printf("7. Power\n");
        printf("8. Decimal to Binary\n");
        printf("9. Reset\n");
        printf("0. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                printf("Enter two numbers: ");
                scanf("%lf %lf", &num1, &num2);
                printf("Result: %.2lf\n", add(num1, num2));
                break;
            case 2:
                printf("Enter two numbers: ");
                scanf("%lf %lf", &num1, &num2);
                printf("Result: %.2lf\n", subtract(num1, num2));
                break;
            case 3:
                printf("Enter two numbers: ");
                scanf("%lf %lf", &num1, &num2);
                printf("Result: %.2lf\n", multiply(num1, num2));
                break;
            case 4:
                printf("Enter two numbers: ");
                scanf("%lf %lf", &num1, &num2);
                printf("Result: %.2lf\n", divide(num1, num2));
                break;
            case 5:
                printf("Enter a number: ");
                scanf("%d", &num);
                printf("Result: %d\n", factorial(num));
                break;
            case 6:
                printf("Enter a number: ");
                scanf("%lf", &num1);
                printf("Result: %.2lf\n", squareRoot(num1));
                break;
            case 7:
                printf("Enter base and exponent: ");
                scanf("%lf %lf", &num1, &num2);
                printf("Result: %.2lf\n", power(num1, num2));
                break;
            case 8:
                printf("Enter a decimal number: ");
                scanf("%d", &num);
                decimalToBinary(num);
                break;
            case 9:
                // 重置操作
                break;
            case 0:
                // 退出程序
                return 0;
            default:
                printf("Invalid choice!\n");
        }
    }

    return 0;
}

这个示例代码实现了一个简单的多功能计算器，可以根据用户的选择进行不同的运算。用户可以输入两个数进行四则运算，输入一个数进行阶乘、平方根、求幂等运算，输入一个十进制数进行二进制转换。你可以根据自己的需求进行修改和扩展。