【正文】 f(k==0) printf(\n\n字符串a(chǎn)等于字符串b：%4d\n\n,k)。}715include iostreamvoid main(){char s1[80],s2[80]。int i,j。printf(輸入數(shù)組s1\n\n)。gets(s1)。printf(輸入數(shù)組s2\n\n)。gets(s2)。for(i=0。i80amp。amp。s2[i]!=39。\039。i++){s1[i]=s2[i]。}s1[i]=39。\039。printf(\n\n復(fù)制后的數(shù)組為：\n\n)。puts(s1)。}第八章81include iostreamvoid main(){int max_div(int,int)。int min_mul(int,int)。int m,n。printf(輸入兩個整數(shù)\n\n)。scanf(%d%d,amp。m,amp。n)。if(max_div(m,n)==0) printf(\n\n無最大公約數(shù)為\n\n)。else printf(\n\n最大公倍數(shù)為：%d\n\n,max_div(m,n))。printf(\n\n最大公倍數(shù)為：%d\n\n,min_mul(m,n))。}int max_div(int k1,int k2){int min(int,int)。int i,k,flag。k=min(k1,k2)。for(i=k。i1。i){if((k1%i==0)amp。amp。(k2%i==0)){return(i)。flag=1。break。}else flag=0。}if(flag==0) return(0)。}int min_mul(int k1,int k2){int max(int,int)。int i,k。k=max(k1,k2)。for(i=k。i++){if((i%k1==0)amp。amp。(i%k2==0)){return(i)。break。}}}int min(int k1,int k2){int min。min=k1。if(k1k2) min=k2。return(min)。}int max(int k1,int k2){int max。max=k1。if(k1k2) max=k2。return(max)。}82include iostreaminclude void main(){void root1(float,float,float)。void root2(float,float,float)。void root3(float,float,float)。float a,b,c,k。printf(輸入a,b,c的值\n\n)。scanf(%f%f%f,amp。a,amp。b,amp。c)。k=b*b4*a*c。if(k0) root1(a,b,c)。else if(k==0) root2(a,b,c)。else root3(a,b,c)。}void root1(float a,float b,float c){float p,q。p=b/(2*a)。q=sqrt(b*b4*a*c)/(2*a)。printf(\n\n方程的兩個根為：x1=%,x2=%\n\n,p+q,pq)。}void root2(float a,float b,float c){float p。p=b/(2*a)。printf(\n\n方程的兩個根為：x1=x2=%\n\n,p)。}void root3(float a,float b,float c){float p,q。p=b/(2*a)。q=sqrt(b*b+4*a*c)/(2*a)。printf(\n\n方程的兩個根為：x1=%+%,x2=%%\n\n,p,q,p,q)。}83include iostreamvoid main(){int prime(int)。int x。printf(輸入一個正整數(shù)\n\n)。scanf(%d,amp。x)。if(prime(x)==0) printf(\n\n此數(shù)為素數(shù)\n\n)。else printf(\n\n此數(shù)不是素數(shù)\n\n)。}int prime(int x){int i,flag。for(i=2。ix。i++){if(x%i==0){flag=1。break。}else flag=0。}return(flag)。}84include iostreamvoid main(){void exchange(int a[3][3])。int a[3][3],i,j。printf(輸入一個3*3的矩陣\n\n)。for(i=0。i3。i++){for(j=0。j3。j++){scanf(%d,amp。a[i][j])。}}exchange(a)。printf(\n\n轉(zhuǎn)置后的矩陣為：\n\n)。for(i=0。i3。i++){for(j=0。j3。j++){printf(%d ,a[i][j])。}printf(\n)。}}85include iostreamvoid main(){void exchange(char str[])。char str[80]。printf(輸入一個字符串\n\n)。gets(str)。exchange(str)。printf(\n\n反序字符串為：\n\n)。puts(str)。}void exchange(char str[]){int i,j,k。char temp。for(i=0。i++){if(str[i]==39。\039。) break。}k=i/2。for(j=0。j=k。j++){temp=str[j]。str[j]=str[i1j]。str[i1j]=temp。}str[i]=39。\039。}86include iostreamvoid main(){void strcat(char str1[],char str2[])。char str1[80],str2[80]。printf(輸入str1\n\n)。gets(str1)。printf(\n\n輸入str2\n\n)。gets(str2)。strcat(str1,str2)。printf(\n\n連接后的字符串為：\n\n)。puts(str1)。}void strcat(char str1[],char str2[]){int i,j。for(i=0。i++){if(str1[i]==39。\039。){for(j=0。str2[j]!=39。\039。j++){str1[i]=str2[j]。i+=1。}break。}}str1[i]=39。\039。}87include iostreamvoid main(){void strcpy(char str1[],char str2[])。char str1[80],str2[80]。printf(輸入str2\n\n)。gets(str2)。strcpy(str1,str2)。printf(\n\n復(fù)制后的字符串為：\n\n)。puts(str1)。}void strcpy(char str1[],char str2[]){int i,j=0。for(i=0。str2[i]!=39。\039。i++){if((str2[i]==39。a39。)||(str2[i]==39。e39。)||(str2[i]==39。i39。)||(str2[i]==39。o39。)||(str2[i]==39。u39。)){str1[j]=str2[i]。j++。}}str1[j]=39。\039。}88include iostreamvoid main(){160