#include <stdio.h>
#include <float.h>

int main(int argc, const char *argv[] ) {
 
    int age = 20；

    char *name = "tom";

    char c = 'A';

    float f = 3.14;

    double d = 3.1415926;



    printf("age=%d\n",age);

    printf("name=%s\n",name);

    printf("c=%c\n",c);

    printf("f=%f\n",f);

    printf("d=%f\n",d);
     

    return 0;

  

}

   int age = 20；//标点符号为英文状态下的

谢谢@！