• 코드:
​x
 
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#include <stdio.h>
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​
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double add(double, double);
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double sub(double, double);
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double mul(double, double);
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double div(double, double);
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double calculator(double , double, double (*func)(double, double));
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​
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int main(void)
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{
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    double (*calc)(double, double) = NULL;  // 함수 포인터 선언
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    double result = 0;
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    double num01 = 3, num02 = 5;
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    char oper = '*';
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​
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    switch (oper)
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    {
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        case '+':
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            calc = add;
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            break;
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        case '-':
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            calc = sub;
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            break;
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        case '*':
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            calc = mul;
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            break;
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        case '/':
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            calc = div;
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            break;
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        default:
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            puts("사칙연산(+, -, *, /)만을 지원합니다.");
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    }
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​
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    result = calculator(num01, num02, calc);
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    printf("사칙 연산의 결과는 %lf입니다.\n", result);
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    return 0;
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}
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​
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double add(double num01, double num02)
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{
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    return num01 + num02;
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}
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​
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double sub(double num01, double num02)
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{
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    return num01 - num02;
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}
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​
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double mul(double num01, double num02)
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{
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    return num01 * num02;
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}
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​
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double div(double num01, double num02)
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{
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    return num01 / num02;
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}
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​
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double calculator(double num01, double num02, double (*func)(double, double))
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{
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    return func(num01, num02);
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}
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​
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