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XZG——伪代码2 #35

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//函数功能：计算每个学生各门课程的总分和平均分 //函数功能：计算每个学生各门课程的总分和平均分
``` ```
void AverSumofEveryStudent(STU stu[],int n,int m) function AverSumofEveryStudent(STU stu[],int n,int m) do
{
int i,j; int i,j;
for(i=0;i<n;i++) for form i=0 to n-1 do
{
stu[i].sum = 0; //初始化每个学生总分为0 stu[i].sum = 0; //初始化每个学生总分为0
for(j=0;j<m;j++) for from j=0 to m-1 do
{
stu[i].sum = stu[i].sum + stu[i].score[j]; //累加分数 stu[i].sum = stu[i].sum + stu[i].score[j]; //累加分数
} end
stu[i].aver = m>0 ? stu[i].sum /m : -1; stu[i].aver = m>0 ? stu[i].sum /m : -1;
printf("student %d: sum = %.0f,aver = %.0f\n",i+1,stu[i].sum,stu[i].aver); printf "student %d: sum = %.0f,aver = %.0f\n"
} end
} end
``` ```
//函数功能：计算每门课程的总分和平均分 //函数功能：计算每门课程的总分和平均分
``` ```
void AverSumofEveryCourse(STU stu[],int n,int m) function AverSumofEveryCourse(STU stu[],int n,int m) do
{
int i,j; int i,j;
float sum[COURSE_NUM],aver[COURSE_NUM]; float sum[COURSE_NUM],aver[COURSE_NUM];
for(j=0;j<m;j++) for from j=0 to m-1 do
{
sum[j] = 0; sum[j] = 0;
for(i=0;i<n;i++) for from i=0 to n-1 do
{
sum[j]+= stu[i].score[j]; //计算n个同学每门课程的总分 sum[j]+= stu[i].score[j]; //计算n个同学每门课程的总分
end
}
aver[j] = sum[j]/i; aver[j] = sum[j]/i;
printf("course %d: sum = %.0f,aver = %.0f\n",j+1, sum[j], aver[j]); printf "course %d: sum = %.0f,aver = %.0f\n"
} end
} end
``` ```
//函数功能：按选择法将数组 sum 的元素值排序 //函数功能：按选择法将数组 sum 的元素值排序
``` ```
void SortbyScore(STU stu[],int n,int m,int(*compare)(float a,float b)) function SortbyScore(STU stu[],int n,int m,int(*compare)(float a,float b)) do
{
int i, j, k, t; int i, j, k, t;
for (i=0; i<n-1; i++) for from i=0 to n-2 do
{
k = i; k = i;
for (j=i+1; j<n; j++) for from i+1 to n-1 do
{ if (*compare)(stu[j].sum, stu[k].sum) set k = j;
if ((*compare)(stu[j].sum, stu[k].sum)) k = j; end
} if k != i
if (k != i) for from t=0 to m-1 do //交换m门课程的成绩
{
for (t=0; t<m; t++) //交换m门课程的成绩
{
SwapFloat(&stu[k].score[t], &stu[i].score[t]); SwapFloat(&stu[k].score[t], &stu[i].score[t]);
} end
SwapFloat(&stu[k].sum, &stu[i].sum); //交换总分 SwapFloat(&stu[k].sum, &stu[i].sum); //交换总分
SwapFloat(&stu[k].aver, &stu[i].aver); //交换平均分 SwapFloat(&stu[k].aver, &stu[i].aver); //交换平均分
SwapLong(&stu[k].num, &stu[i].num); //交换学号 SwapLong(&stu[k].num, &stu[i].num); //交换学号
SwapChar(stu[k].name, stu[i].name); //交换姓名 SwapChar(stu[k].name, stu[i].name); //交换姓名
} end
} end
} end
``` ```
//使数据按升序排序 //使数据按升序排序
``` ```
int Ascending(float a,float b) function Ascending(float a,float b) do
{
return a < b; //这样比较决定了按升序排序，如果a<b，则交换 return a < b; //这样比较决定了按升序排序，如果a<b，则交换
} end
``` ```
//使数据按降序排序 //使数据按降序排序
``` ```
int Descending(float a,float b) function Descending(float a,float b) do
{
return a > b; // 这样比较决定了按降序排序，如果 a>b，则交换 return a > b; // 这样比较决定了按降序排序，如果 a>b，则交换
} end
``` ```
//交换两个单精度浮点型数据 //交换两个单精度浮点型数据
``` ```
void SwapFloat(float *x,float *y) function SwapFloat(float *x,float *y) do
{
float temp; float temp;
temp = *x; temp = *x;
*x = *y; *x = *y;
*y = temp; *y = temp;
} end
``` ```
//交换两个长整型数据 //交换两个长整型数据
``` ```
void SwapLong(long *x,long *y) function SwapLong(long *x,long *y) do
{
long temp; long temp;
temp = *x; temp = *x;
*x = *y; *x = *y;
*y = temp; *y = temp;
} end
``` ```
//交换两个字符串 //交换两个字符串
``` ```
void SwapChar(char x[],char y[]) function SwapChar(char x[],char y[]) do
{
char temp[MAX_LEN]; char temp[MAX_LEN];
strcpy(temp, x); strcpy(temp, x);
strcpy(x, y); strcpy(x, y);
strcpy(y, temp); strcpy(y, temp);
} end
``` ```
//函数功能：按选择法将数组 num 的元素从低到高排序 //函数功能：按选择法将数组 num 的元素从低到高排序
``` ```
void AsSortbyNum(STU stu[],int n,int m) function AsSortbyNum(STU stu[],int n,int m) do
{
int i, j, k, t; int i, j, k, t;
for (i=0; i<n-1; i++) for from i=0 to n-2 do
{
int i, j, k, t; int i, j, k, t;
k = i; set k = i;
for (j=i+1; j<n; j++) for from j=i+1 to n-1 do
{ if stu[j].num < stu[k].num set k = j;
if (stu[j].num < stu[k].num) k = j; end
} if k != i do
if (k != i) for from t=0 to m-1 do //交换m门课程的成绩
{
for (t=0; t<m; t++) //交换m门课程的成绩
{
SwapFloat(&stu[k].score[t], &stu[i].score[t]); SwapFloat(&stu[k].score[t], &stu[i].score[t]);
} end
SwapFloat(&stu[k].sum, &stu[i].sum); //交换总分 SwapFloat(&stu[k].sum, &stu[i].sum); //交换总分
SwapFloat(&stu[k].aver, &stu[i].aver); //交换平均分 SwapFloat(&stu[k].aver, &stu[i].aver); //交换平均分
SwapLong(&stu[k].num, &stu[i].num); //交换学号 SwapLong(&stu[k].num, &stu[i].num); //交换学号
SwapChar(stu[k].name, stu[i].name); //交换姓名 SwapChar(stu[k].name, stu[i].name); //交换姓名
} end
} end
} end
``` ```
//函数功能：交换法实现字符串按字典顺序排序 //函数功能：交换法实现字符串按字典顺序排序
``` ```
void SortbyName(STU stu[],int n,int m) function SortbyName(STU stu[],int n,int m) do
{
int i, j, t; int i, j, t;
for (i=0; i<n-1; i++) for from i=0 to n-2 do
{ for from j = i+1 to n-1 do
for (j = i+1; j<n; j++) if strcmp(stu[j].name, stu[i].name) < 0 do
{ for from t=0 to m-1 do //交换m门课程的成绩
if (strcmp(stu[j].name, stu[i].name) < 0)
{
for (t=0; t<m; t++) //交换m门课程的成绩
{
SwapFloat(&stu[i].score[t], &stu[j].score[t]); SwapFloat(&stu[i].score[t], &stu[j].score[t]);
} end
SwapFloat(&stu[i].sum, &stu[j].sum); //交换总分 SwapFloat(&stu[i].sum, &stu[j].sum); //交换总分
SwapFloat(&stu[i].aver, &stu[j].aver); //交换平均分 SwapFloat(&stu[i].aver, &stu[j].aver); //交换平均分
SwapLong(&stu[i].num, &stu[j].num); //交换学号 SwapLong(&stu[i].num, &stu[j].num); //交换学号
SwapChar(stu[i].name, stu[j].name); //交换姓名 SwapChar(stu[i].name, stu[j].name); //交换姓名
} end
} end
} end
} end
``` ```
//函数功能：按学号查找学生成绩并显示查找结果 //函数功能：按学号查找学生成绩并显示查找结果
``` ```
void SearchbyNum(STU stu[],int n,int m) function SearchbyNum(STU stu[],int n,int m) do
{
long number; long number;
int i,j; int i,j;
printf("Input the number you want to search:"); printf"Input the number you want to search:"
scanf("%ld",&number); input number
for(i=0;i<n;i++) forfrom i=0 to n-1 do
if(stu[i].num==number) if stu[i].num==number do
{ printf"\n"
printf("\n"); for from j=0 to m-1 do
for(j=0;j<m;j++) printf "%d\t"
printf("%d\t",stu[i].score[j]); printf "\n"
printf("\n");
break; break;
} end
if(i==n) if i==n
printf("\nNot found!\n"); printf "\nNot found!\n"
} end
``` ```
//函数功能：按姓名查找学生成绩并显示查找结果 //函数功能：按姓名查找学生成绩并显示查找结果
``` ```
void SearchbyName(STU stu[],int n,int m) function SearchbyName(STU stu[],int n,int m) do
{
char x[MAX_LEN]; char x[MAX_LEN];
int i,j; int i,j;
printf("Input the name you want to search:"); printf "Input the name you want to search:"
scanf("%s", x); input x
for(i=0;i<n;i++) for from i=0 to n-1 do
{ if strcmp(stu[i].name,x)==0 do
if(strcmp(stu[i].name,x)==0) printf "%ld\t%s\t",stu[i].num,stu[i].name"
{ for from j=0 to m-1 do
printf("%ld\t%s\t",stu[i].num,stu[i].name); printf "%.0f\t"
for(j=0;j<m;j++) end
{ printf ".0f\t%.0f\n"
printf("%.0f\t",stu[i].score[j]);
}
printf(".0f\t%.0f\n",stu[i].sum,stu[i].aver);
return; return;
} end
} end
printf("\nNot found!\n"); printf "\nNot found!\n"
} end
``` ```
//函数功能：统计各分数段的学生人数及所占的百分比 //函数功能：统计各分数段的学生人数及所占的百分比
``` ```
void StatisticAnalysis(STU stu[],int n,int m) funtion StatisticAnalysis(STU stu[],int n,int m) do
{
int i,j,t[6]; int i,j,t[6];
for(j=0;j<m;j++) for from j=0 do m-1 do
{ printf "For course %d:\n"
printf("For course %d:\n",j+1);
memset(t,0,sizeof(t)); //将数组 t 的全部元素初始化为0 memset(t,0,sizeof(t)); //将数组 t 的全部元素初始化为0
for(i=0;i<n;i++) for from i=0 to n-1 do
{ if stu[i].score[j]>=0&&stu[i].score[j]<60 set t[0]++
if(stu[i].score[j]>=0&&stu[i].score[j]<60) t[0]++; else if stu[i].score[j]<70 set t[1]++;
else if(stu[i].score[j]<70) t[1]++; else if stu[i].score[j]<80 set t[2]++;
else if(stu[i].score[j]<80) t[2]++; else if stu[i].score[j]<90 set t[3]++;
else if(stu[i].score[j]<90) t[3]++; else if stu[i].score[j]<100 set t[4]++;
else if(stu[i].score[j]<100) t[4]++; else if stu[i].score[j]==100 set t[5]++;
else if(stu[i].score[j]==100) t[5]++; end
} for from i=0 to 4 do
for(i=0;i<=5;i++) if i==0 printf "<60\t%d\t%.2f%%\n"
{ else if i==5 printf "%d\t%d\t%.2f%%\n"
if(i==0) printf("<60\t%d\t%.2f%%\n",t[i],(float)t[i]/n*100); else printf "%d-%d\t%d\t%.2f%%\n"
else if(i==5) printf("%d\t%d\t%.2f%%\n",(i+5)*10,t[i],(float)t[i]/n*100); end
else printf("%d-%d\t%d\t%.2f%%\n",(i+5)*10,(i+5)*10+9,t[i],(float)t[i]/n*100); end
} end
}
}
``` ```
//函数功能：打印学生成绩 //函数功能：打印学生成绩
``` ```
void PrintScore(STU stu[],int n,int m) function PrintScore(STU stu[],int n,int m) do
{
int i,j; int i,j;
for (i=0; i<n; i++) for from i=0 to n-1 do
{ printf "%ld\t%s\t"
printf("%ld\t%s\t", stu[i].num, stu[i].name); for from j=0 to m-1 do
for (j=0; j<m; j++) printf "%.0f\t"
{ end
printf("%.0f\t", stu[i].score[j]); printf "%.0f\t%.0f\n"
} end
printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver); end
}
}
``` ```
//输出 n 个学生的学号、姓名及 m 门课程的成绩到文件 student.txt 中 //输出 n 个学生的学号、姓名及 m 门课程的成绩到文件 student.txt 中
``` ```
void WritetoFile(STU stu[],int n,int m) function WritetoFile(STU stu[],int n,int m) do
{
FILE *fp; FILE *fp;
int i, j; int i, j;
if((fp = fopen("student.txt","w")) == NULL) if fp = fopen("student.txt","w") == NULL do
{ printf "Failure to open score.txt!\n"
printf("Failure to open score.txt!\n");
exit(0); exit(0);
} end
fprintf(fp, "%d\t%d\n", n, m); //将学生人数和课程门数写入文件 fprintf(fp, "%d\t%d\n", n, m); //将学生人数和课程门数写入文件
for (i=0; i<n; i++) for from i=0 to n-1 do
{
fprintf(fp, "%10ld%10s", stu[i].num, stu[i].name); fprintf(fp, "%10ld%10s", stu[i].num, stu[i].name);
for (j=0; j<m; j++) for from j=0 to m-1 do
{
fprintf(fp, "%10.0f", stu[i].score[j]); fprintf(fp, "%10.0f", stu[i].score[j]);
} end
fprintf(fp, "%10.0f%10.0f\n", stu[i].sum, stu[i].aver); fprintf(fp, "%10.0f%10.0f\n", stu[i].sum, stu[i].aver);
} end
fclose(fp); fclose(fp);
} end
``` ```
//从文件中读取学生的学号、姓名及成绩等信息写入到结构体 stu 中 //从文件中读取学生的学号、姓名及成绩等信息写入到结构体 stu 中
``` ```
void ReadfromFile(STU stu[],int *n,int *m) function ReadfromFile(STU stu[],int *n,int *m) do
{
FILE *fp; FILE *fp;
int i, j; int i, j;
if ((fp = fopen("student.txt","r")) == NULL) if fp = fopen("student.txt","r") == NULL do
{ printf "Failure to open score.txt!\n"
printf("Failure to open score.txt!\n");
exit(0); exit(0);
} end
fscanf(fp, "%d\t%d", n, m); //从文件中读出学生人数，课程门数 fscanf(fp, "%d\t%d", n, m); //从文件中读出学生人数，课程门数
for (i=0; i<*n; i++) //学生人数保存在n指向的储存单元 for from i=0 to *n-1 do //学生人数保存在n指向的储存单元
{
fscanf(fp, "%10ld", &stu[i].num); fscanf(fp, "%10ld", &stu[i].num);
fscanf(fp, "%10s", stu[i].name); fscanf(fp, "%10s", stu[i].name);
for (j=0; j<*m; j++) //课程门数保存在m指向的储存单元 for form j=0 to *m-1 do //课程门数保存在m指向的储存单元
{
fscanf(fp, "%10f", &stu[i].score[j]); //不能用%10.0f fscanf(fp, "%10f", &stu[i].score[j]); //不能用%10.0f
} end
fscanf(fp, "%10f%10f", &stu[i].sum, &stu[i].aver); //不能用%10.0f fscanf(fp, "%10f%10f", &stu[i].sum, &stu[i].aver); //不能用%10.0f
} end
fclose(fp); fclose(fp);
} end
``` ```
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