A function pointer can be used in place of switch case

C Programming Language / Pointer in C Language

971

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Program:

#include <stdio.h>
void add(int a, int b)
{
    printf("Addition is %d\n", a+b);
}
void subtract(int a, int b)
{
    printf("Subtraction is %d\n", a-b);
}
void multiply(int a, int b)
{
    printf("Multiplication is %d\n", a*b);
}
 
int main()
{
    // fun_ptr_arr is an array of function pointers
    void (*fun_ptr_arr[])(int, int) = {add, subtract, multiply};
    unsigned int ch, a = 15, b = 10;
 
    printf("Enter Choice: 0 for add, 1 for subtract and 2 "
            "for multiply\n");
    scanf("%d", &ch);
 
    if (ch > 2) return 0;
 
    (*fun_ptr_arr[ch])(a, b);
 
    return 0;
}

Output:

Enter Choice: 0 for add, 1 for subtract and 2 for multiply
2
Multiplication is 150 

Explanation:

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