使用printf()函数打印变量内容

要打印变量的内容，请使用printf()函数并指一些新格式选项。

#include <stdio.h> 
int main()
{ 
   //variable declarations 

   int x; 
   float y; 
   char c; 

   //variable initializations 

   x = -1234; 
   y = 123.12; 
   c = 'M'; 

   //printing variable contents to standard output 
   printf("\nThe value of integer variable x is %d", x); 
   printf("\nThe value of float variable y is %f", y); 
   printf("\nThe value of character variable c is %c\n", c); 
}