错误C2664：'int printf（const char * const，...）'：无法将参数2从'void'转换为'...'

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#include <iostream>
#include <stack>

void convert(std::stack<char> &s, int n,int base)
{
    static char digit[]={
            '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
    };
    while(n>0)
    {
        s.push(digit[n%base]);
        n/=base;
    }

}


int main() {
    std::cout << "Hello, World!" << std::endl;
    std::stack<char> s;
    int n=89;
    int base=2;
    convert(s,n,base);
    while(!s.empty())
    {
        printf("%c",s.pop());//this line is can not be compiled.
    }
    return 0;
}

enter image description here I do not understand why this line can not be compiled. Cannot pass expression of type 'void' to variadic function;expected type from format string was 'int'.