cannot take char as input after taking two int as input in c same time [duplicate]

In this program i can take two integers but cannot take char as input.. what shuold i do in this situation to take both int and char? i would like to make a simple calculator where i can choose the operator such as +,-,/,* to perform calculation.

#include <stdio.h>
#include <stdlib.h>
//Adding two real numbers using character type variable

int main()
{
    int a,b,c;
    char ch;
    printf("Enter two number: \n");
    scanf("%d %d", &a,&b);
    ch=getchar();

    if((ch=='+')){
        c=a+b;
        printf("%d", c);
    }
    else{
        printf("wrong!");
    }

    return 0;
}

`