C语言浮点型转成字符串

代码如下，

#include <stdio.h>
#include <stdlib.h>

int main()
{
    float a = 18.9; //double型处理方式相同

    char b[5];

    sprintf(b,"%2.1f",a); //精度为0.1

    printf("%s\n",b);

    return 0;
}