input.c

C Primer Plus(第五版)中文版,不用多说了

// input.c -- when to use & 
#include <stdio.h>
int main(void)
{
    int age;             // variable 
    float assets;        // variable 
    char pet[30];        // string   

    printf("Enter your age, assets, and favorite pet.\n");
    scanf("%d %f", &age, &assets); // use the & here      
    scanf("%s", pet);              // no & for char array 
    printf("%d $%.2f %s\n", age, assets, pet);
    
    return 0;
}