# include <stdio.h>

void main()
{
    /* 定义变量并赋初值 */
     int    a = 5;      
    char   c = 'a';  
    float  f = 5.3;    
    double m = 12.65;
    double result;
    
    /* 同类型数据间进行运算并输出结果 */
    printf("a + c = %d\n", a + c);
    printf("a + c = %c\n", a + c);
    printf("f + m = %f\n", f + m);

    /* 不同类型数据间进行运算并输出结果 */
    printf("a + m = %f\n", a + m);
    printf("c + f = %f\n", c + f);

    /* 将上述四个变量进行混合运算，并输出结果 */
    result = a + c * (f + m);
    printf("double = %f\n", result);
}