怎么把数字1-9转化为对应的字符'1'-'9'

怎么把数字1-9转化为对应的字符'1'-'9'
怎么把数字1-9转化为对应的字符'1'-'9'
怎么把数字1-9转化为对应的字符'1'-'9'

int i = 3;
char c = '0' + i;