void input_stu(void) {int i,j;
for (i=0;i {printf(\ for (j=0;j scanf(\ } } void aver_stu(void) {int i,j; float s; for (i=0;i {for (j=0,s=0;j void aver_cour(void) {int i,j; float s; for (j=0;j for (i=0;i float highest() {float high; int i,j; high=score[0][0]; for (i=0;i return(high); } float s_var(void) {int i; float sumx,sumxn; sumx=; sumxn=; for (i=0;i {sumx+=a_stu[i]*a_stu[i]; sumxn+=a_stu[i]; } return(sumx/N-(sumxn/N)*(sumxn/N)); } 7-15 #include <> #include <> #define N 10 int main() {void input(int [],char name[][8]); void sort(int [],char name[][8]); void search(int ,int [],char name[][8]); int num[N],number,flag=1,c; char name[N][8]; input(num,name); sort(num,name); while (flag==1) {printf(\ scanf(\ search(number,num,name); printf(\ getchar(); c=getchar(); if (c=='N'||c=='n') flag=0; } return 0; } void input(int num[],char name[N][8]) {int i; for (i=0;i {printf(\ scanf(\ printf(\ getchar(); gets(name[i]); } } void sort(int num[],char name[N][8]) { int i,j,min,templ; char temp2[8]; for (i=0;i for (j=i;j if (num[min]>num[j]) min=j; templ=num[i]; strcpy(temp2,name[i]); num[i]=num[min]; strcpy (name[i],name[min]); num[min]=templ; strcpy(name[min],temp2); } printf(\ for (i=0;i printf(\ } void search(int n,int num[],char name[N][8]) {int top,bott,mid,loca,sign; top=0; bott=N-1; loca=0; sign=1; if ((n while((sign==1) && (top<=bott)) {mid=(bott+top)/2; if (n==num[mid]) {loca=mid; printf(\ sign=-1; } else if (n } if (sign==1 || loca==-1) printf(\ } 7-16 #include <> #define MAX 1000 int main() { int htoi(char s[]); int c,i,flag,flag1; char t[MAX]; i=0; flag=0; flag1=1; printf(\ while((c=getchar())!='\\0' && i {if (c>='0' && c<='9'||c>='a' && c<='f'||c>='A' && c<='F') {flag=1; t[i++]=c; } else if (flag) {t[i]='\\0'; printf(\ number %d\\n\ printf(\ c=getchar(); if (c=='N'||c=='n') flag1=0; else {flag=0; i=0; printf(\ } } } return 0; } int htoi(char s[]) { int i,n; n=0; for (i=0;s[i]!='\\0';i++)