c语言 13-4

1、

#include <stdio.h>

#define NUMBER 6

typedef struct{
    char name[128];
    double height;
    double weight;
}Type1;

int main(void)
{
    FILE *fp;
    
    fp = fopen("xxx.txt", "w");
    
    if(fp == NULL)
        printf("afile open failed.
");
    else
    {
        Type1 x[NUMBER];    
        int i;
        for(i = 0; i < NUMBER; i++)
        {
            printf("NO.%d name: ", i + 1); scanf("%s", x[i].name);
            printf("NO.%d height: ", i + 1); scanf("%lf", &x[i].height);
            printf("NO.%d weight: ", i + 1); scanf("%lf", &x[i].weight); 
            fp = fopen("xxx.txt", "a");
            fprintf(fp, "%s %8.2f %8.2f
", x[i].name, x[i].height, x[i].weight);
            fclose(fp);
        }
    }    
    return 0;
}

 

2、

#include <stdio.h>

#define NUMBER 6

int main(void)
{
    FILE *fp;
    
    char name[128];
    double height, weight;
    
    fp = fopen("xxx.txt", "w");
    
    int i = NUMBER;
    while(i > 0 && scanf("%s%lf%lf", name, &height, &weight))
    {
        fprintf(fp, "%-8s%8.2f%8.2f
", name, height, weight);
        i--;
    }
    
    return 0;
}

 

3、

#include <stdio.h>

#define NUMBER 6

typedef struct{
    char name[128];
    double height;
    double weight;
}Type1;

int main(void)
{
    FILE *fp;
    
    fp = fopen("xxx.txt", "w");
    
    Type1 x[NUMBER];
    int i;
    
    for(i = 0; i < NUMBER; i++)
    {
        printf("NO.%d name: ", i + 1); scanf("%s", x[i].name);
        printf("NO.%d height: ", i + 1); scanf("%lf", &x[i].height);
        printf("NO.%d.weight: ", i + 1); scanf("%lf", &x[i].weight);
        fprintf(fp, "%-8s%8.2f%8.2f
", x[i].name, x[i].height, x[i].weight);
    }
    fclose(fp);
    
    return 0;
}

 

4、

#include <stdio.h>

#define NUMBER 3

int main(void)
{
    FILE *fp;
    
    fp = fopen("xxx.txt", "w");
    
    char name[128];
    double height;
    double weight;
    
    int i;
    for(i = 0; i < NUMBER; i++)
    {
        printf("person%d.name: ", i + 1); scanf("%s", name);
        printf("person%d.height: ", i + 1); scanf("%lf", &height);
        printf("person%d.weight: ", i + 1); scanf("%lf", &weight);
        
        fprintf(fp, "%-8s%8.2f%8.2f
", name, height, weight);
    }
    fclose(fp);
    return 0;
}

 

5、

#include <stdio.h>

int main(void)
{
    FILE *fp;
    
    fp = fopen("xxx.txt", "w");
    
    char name[128];
    double height, weight;
    
    while(scanf("%s%lf%lf", name, &height, &weight) == 3)
    {
        fprintf(fp, "%-8s%8.2f%8.2f
", name, height, weight);
    }
    fclose(fp);
    
    return 0;
}

6、

#include <stdio.h>

int main(void)
{
    FILE *fp;
    
    fp = fopen("xxx.txt", "w");
    
    char name[128];
    double height, weight;
    
    int i = 2;
    while(i-- > 0)
    {
        scanf("%s%lf%lf", name, &height, &weight);
        fprintf(fp, "%-8s%8.2f%8.2f
", name, height, weight);
    }
    fclose(fp);
    
    return 0;
}