吴裕雄--天生自然C语言开发： 输入 & 输出

#include <stdio.h>
int main()
{
    int testInteger = ;
    printf("Number = %d", testInteger);
    return ;
}

#include <stdio.h>
int main()
{
    float f;
    printf("Enter a number: ");
    // %f 匹配浮点型数据
    scanf("%f",&f);
    printf("Value = %f", f);
    return ;
}

#include <stdio.h>

int main( )
{
   int c;

   printf( "Enter a value :");
   c = getchar( );

   printf( "\nYou entered: ");
   putchar( c );
   printf( "\n");
   return ;
}

#include <stdio.h>

int main( )
{
   char str[];

   printf( "Enter a value :");
   gets( str );

   printf( "\nYou entered: ");
   puts( str );
   return ;
}

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

   char str[];
   int i;

   printf( "Enter a value :");
   scanf("%s %d", str, &i);

   printf( "\nYou entered: %s %d ", str, i);
   printf("\n");
   return ;
}