9.1 把一个学生的信息(包括学号、姓名、性别、住址)放在一个结构体变量中,然后输出这个学生的信息。 复制代码 #includeint main() { struct student { long int num; char name[20]; char sex; char addr[20]; }a = { 10101, "Lin", 'M', "123 Beijing Road" }; aprintf("NO.:%1d\nname:%s\nsex:%c\naddress:%s\n", a.num, a.name, a.sex, a.addr); return 0; } /*NO.:10101 name:Lin sex:M address:123 Beijing Road 请按任意键继续. . . */ 复制代码 在写此程序是并没有遇到什么问题! 9.2 输入2个学生的学号,姓名和成绩,输出成绩较高的学生的学号,姓名和成绩。 复制代码 #include int main() { struct student { int num; char name[20]; float score; } student1,student2; scanf("%d%s%f", &student1.num, &student1.name, &student1.score); scanf("%d%s%f", &student2.num, &student2.name, &student2.score); printf("The higher score is:\n"); if (student1.score > student2.score) printf("%d %s %6.2f\n", student1.num, student1.name, student1.score); else if (student1.score < student2.score) printf("%d %s %6.2f\n", student2.num, student2.name, student2.score); else { printf("%d %s %6.2f\n", student1.num, student1.name, student1.score); printf("%d %s %6.2f\n", student2.num, student2.name, student2.score); } } /*10101 Wang 89 10103 Lin 90 The higher score is: 10103 Lin 90.00 请按任意键继续. . . */ 9.3 有3个候选人,每个选民只能选投票一人,要求编一个统计选票的程序,先后输入被选人的名字,最后输出各人得票结果。 复制代码 #include struct person { char name[20]; int count; } leader[3] = {"li",0, "zhan",0,"sun",0}; int main() { int i, j; char leader_name[20]; for (i = 1; i <= 10;i++) { scanf("%s", leader_name); for ( j = 0; j < 3; j++) if (strcmp(leader_name, leader[j].name) == 0) leader[j].count++; } printf("\nResult:\n"); for (i = 0; i < 3; i++) printf("%5s:%d\n", leader[i].name,leader[i].count); } /*li li sun zhan zhan sun li sun zhan li Result: li:4 zhan:3 sun:3 请按任意键继续. . . */ 复制代码 9.4 有n个学生的信息(包括学号,姓名,成绩),要求按照成绩的高低顺序输出各学生的信息。 复制代码 #include struct student { int num; char name[20]; float score; }; int main() { struct student stu[5] = { { 10101, "zhang", 78 }, { 10103, "wang", 98.5 }, { 10106, "li", 86 }, { 10108, "ling", 73.5 }, { 10110, "sun", 100 } }; struct student temp; int i, j; printf("The order is :\n"); for (i = 0; i < 4; i++) for (j = 0; j < 4 - i; j++) if (stu[j].score>stu[j + 1].score){ temp = stu[j]; stu[j] = stu[j + 1]; stu[j + 1] = temp; } for (i = 0; i < 5; i++) printf("%6d%8s%6.2f\n", stu[i].num, stu[i].name, stu[i].score); printf("\n"); return 0; } /*The order is : 10108 ling 73.50 10101 zhang 78.00 10106 li 86.00 10103 wang 98.50 10110 sun100.00 请按任意键继续. . . */ 复制代码 9.5 通过指向结构体变量的指针变量来输出结构体中成员的信息。 复制代码 #include #include <string.h> int main() { struct student { long num; char name[20]; char sex; float score; }; struct student stu1; struct student *p; p = &stu1; stu1.num = 10101; strcpy(stu1.name, "Li Lin"); stu1.sex = 'M'; stu1.score = 89.5; printf("No.:%1d\nname:%s\nsex:%c\nscore:%5.1f\n",stu1.num,stu1.name,stu1.sex,stu1.score); printf("\nNo.:%1d\nname:%s\nsex:%c\nscore:%5.1f\n", (*p).num, (*p).name, (*p).sex, (*p).score); } /*No.:10101 name:Li Lin sex:M score: 89.5 No.:10101 name:Li Lin sex:M score: 89.5 请按任意键继续. . . */ 复制代码 9.6 有n个结构体变量,内含学生学号,姓名和3门课程成绩。要求输出平均成绩最高的学生的信息(包括学号,姓名,3门课程成绩和平均成绩)。 复制代码 #include struct student { int num; char name[20]; char sex; int age; }; struct student stu[3] = { { 10101, "Li Lin", 'M', 18 }, { 10102, "Zhang Fang", 'M', 19 }, { 10103, "Wang Min", 'F', 20 } }; int main() { struct student *p; p = stu; printf("No. Name sex age\n"); for (; p < stu + 3; p++) printf("%5d %-20s%2c%4d\n", p->num, p->name, p->sex, p->age); } /*No. Name sex age 10101 Li Lin M 18 10102 Zhang Fang M 19 10103 Wang Min F 20 请按任意键继续. . . */ 复制代码 9.7 复制代码 #include struct student { int num; char name[20]; float score[3]; float aver; }; void input(struct student stu[]) { int i; printf("请输入各学生的信息:学号,姓名,三门课成绩:\n"); for (i = 0; i < 3; i++){ scanf("%d%s%f%f%f", &stu[i].num, &stu[i].name, &stu[i].score[0], &stu[i].score[1], &stu[i].score[2]); stu[i].aver = (stu[i].score[0] + stu[i].score[1] + stu[i].score[2]) / 3.0; } } struct student max(struct student stu[]) { int i, m = 0; for (i = 1; i<3; i++) if (stu[i].aver>stu[m].aver) m = i; return stu[m]; } void print(struct student stud) { printf("\n成绩最高的学生是:\n"); printf("学号:%d\n姓名: %s\n三门课成绩: %5.1f ,%5.1f,%5.1f\n平均成绩:%5.1f\n", stud.num, stud.name, stud.score[0], stud.score[1], stud.score[2], stud.aver); } int main() { //void input (struct student stu[]); //struct student max(struct student stu[]); //void print(struct student stu); struct student stu[3], *p = stu; input(p); print(max(p)); return 0; } /*请输入各学生的信息:学号,姓名,三门课成绩: 10101 Li 78 89 98 10103 Wang 98.5 87 69 10106 Sun 88 76.5 89 成绩最高的学生是: 学号:10101 姓名: Li 三门课成绩: 78.0 , 89.0, 98.0 平均成绩: 88.3 请按任意键继续. . . */ 总结:通过这次作业让我跟进一步的了解了指针和结构体,知道了自己的不足之处,也使我的编程速度有所提升。