我的C语言学习笔记

//P19 #include <stdio.h> struct date { int year; int month; int day; }; struct student { char name[10]; char sex[5]; int age; date birthday; }; void main() { student ming = {"小明","男",18,{1984,4,14}}; printf("%s %s %d %d %d %d\n",ming.name,ming.sex,ming.age,ming.birthday.year,ming.birthday.month,ming.birthday.day); scanf("%d",&ming.age); printf("%s %s %d %d %d %d\n",ming.name,ming.sex,ming.age,ming.birthday.year,ming.birthday.month,ming.birthday.day); } //P29 Y1 #include <stdio.h> struct Node { int nA; int nB; int nC; };Node node = {0,0,0}; //node要定义成全局变量 void fund() { printf("nA="); scanf("%d",&node.nA); printf("nB="); scanf("%d",&node.nB); printf("nC="); scanf("%d",&node.nC); } void main() { fund(); printf("%d %d %d\n",node.nA,node.nB,node.nC); } //计算天数 #include <stdio.h> struct Date { int year; int month; int day; }; void chang(Date input) { int month = 0,day =0; printf("请输入日期（月.日）：\n"); scanf("%d.%d",&input.month,&input.day); int alldays = 0; switch(input.month) { case 1:alldays = day;break; case 2:alldays = 31 +day;break; case 3:alldays = 31 +28+day;break; case 4:alldays = 31 +28+31+day;break; case 5:alldays = 31 +28+31+30+day;break; case 6:alldays = 31 +28+31+30+31+day;break; case 7:alldays = 31 +28+31+30+31+30+day;break; case 8:alldays = 31 +28+31+30+31+30+31+day;break; case 9:alldays = 31 +28+31+30+31+30+31+30+day;break; case 10:alldays = 31 +28+31+30+31+30+31+30+31+day;break; case 11:alldays = 31 +28+31+30+31+30+31+30+31+30+day;break; case 12:alldays = 334 +day;break; } printf("第%d天\n",alldays); } void main() { struct Date input = {0,0,0}; chang(input); } //输入成绩输出列表和统计 #include <stdio.h> struct marks { int a_mark; int b_mark; int c_mark; }; struct students { char ID[4]; char name[100]; marks input; }mDate[4] = {{"001","大杜",{0,0,0}},{"002","大王",{0,0,0}},{"003","大公",{0,0,0}},{"004","大姜",{0,0,0}}}; void main() { printf("请输入大杜的成绩：\n"); scanf("%d%d%d",&mDate[0].input.a_mark,&mDate[0].input.b_mark,&mDate[0].input.c_mark); printf("请输入大王的成绩：\n"); scanf("%d%d%d",&mDate[1].input.a_mark,&mDate[1].input.b_mark,&mDate[1].input.c_mark); printf("请输入大公的成绩：\n"); scanf("%d%d%d",&mDate[2].input.a_mark,&mDate[2].input.b_mark,&mDate[2].input.c_mark); printf("请输入大姜的成绩：\n"); scanf("%d%d%d",&mDate[3].input.a_mark,&mDate[3].input.b_mark,&mDate[3].input.c_mark); int n0 = (mDate[0].input.a_mark+mDate[0].input.b_mark+mDate[0].input.c_mark)/3; int n1 = (mDate[1].input.a_mark+mDate[1].input.b_mark+mDate[1].input.c_mark)/3; int n2 = (mDate[2].input.a_mark+mDate[2].input.b_mark+mDate[2].input.c_mark)/3; int n3 = (mDate[3].input.a_mark+mDate[3].input.b_mark+mDate[3].input.c_mark)/3; printf("学号\t 姓名\t 科目成绩\t 平均分数\n"); printf("-------------------------------------------------------\n"); printf("%s\t %s\t %d, %d, %d\t\ %d\n",mDate[0].ID,mDate[0].name,mDate[0].input,n0); printf("%s\t %s\t %d, %d, %d\t\ %d\n",mDate[1].ID,mDate[1].name,mDate[1].input,n1); printf("%s\t %s\t %d, %d, %d\t\ %d\n",mDate[2].ID,mDate[2].name,mDate[2].input,n2); printf("%s\t %s\t %d, %d, %d\t\ %d\n",mDate[3].ID,mDate[3].name,mDate[3].input,n3); int markdata[4] = {n0,n1,n2,n3}; int temp_mark = 0; for(int i = 0;i < 3;i++) { if(markdata[i]>markdata[i+1]) { int temp = markdata[i]; markdata[i] = markdata[i+1]; markdata[i+1] = temp; } }//冒泡一次，只求出最好的成绩 temp_mark = markdata[3]; printf("成绩最好的家伙是：\n"); for(int j = 0;j < 4;j++) { if((mDate[j].input.a_mark+mDate[j].input.b_mark+mDate[j].input.c_mark)/3 == temp_mark) { printf("%s\t %s\t %d, %d, %d\t\ %d\n",mDate[j].ID,mDate[j].name,mDate[j].input,temp_mark); break; } } }