[C++知识库]c语言程序设计-（第四版）第七章

7.2

#include<stdio.h>

void Count(int a,int b){
    int Max;
    if(a>b){
        Max = a;
    } else{
        Max = b;
    }
    printf("较大的是%d",Max);
}

int main(void){
    int j,k;
    printf("输入两个数字：");
    scanf("%d,%d",&j,&k);
    Count(j,k);
}

7.3

#include<stdio.h>

int LCM(int a,int b){
    int x,find = 0;
    for(x = 1;!find;x++){
        if(x%a==0&&x%b==0){
            find = 1;
        }
    }
    return x-1;
}

int main(){
    int j,k;
    printf("输入两个数字：");
    scanf("%d,%d",&j,&k);

    printf("%d",LCM(j,k));
    return 0;
}

7.5

#include <stdio.h>

int Fact(int n){
    int p = 1,i;
    for(i = 1;i<=n;i++){
        p*=i;
    }
    return p;
}

int main(void){
    int a,b;
    scanf("%d",&a);
    for(b = 1;b<=a;b++){
        printf("%d!=%d\n",b,Fact(b));
    }
}

7.6

#include <stdio.h>

int Fact(int n){
    int p ,i,j,sum=0;
    for(j = 1;j<=n;j++) {
        p = 1;
        for (i = 1; i <= j; i++) {
            p *= i;
        }
        sum+=p;
    }
    return sum;
}

int main(void){
    int a;
    scanf("%d",&a);
    printf("和为%d", Fact(a));

}

7.7

#include<stdio.h>
int Gcd(int a,int b);
int main()
{
    int m,n;
    printf("Input m,n:");
    scanf("%d,%d",&m,&n);
    printf("%d\n",Gcd(m,n));
    return 0;
}
int Gcd(int a,int b)
{
    int t,min,find=0;
    min=a<b?a:b;
    t=min;
    for(t=min;!find;t--)
    {
        a%t==0;
        b%t==0;
        if(a%t==0&&b%t==0)
            return t;
    }
    find=1;
}

#include<stdio.h>
int Gcd(int a,int b);
int main()
{
    int m,n;
    printf("Input m,n:");
    scanf("%d,%d",&m,&n);
    printf("%d\n",Gcd(m,n));
    return 0;
}
int Gcd(int a,int b)
{
    int r,temp;
    r=a%b;
    if(r==0)
        return b;
    else
        do{
            temp=b;
            b=r;
            a=temp;
            r=a%b;
        }while(r!=0);
    return b;
}

#include<stdio.h>
int Gcd(int a,int b);
int main()
{
    int m,n;
    printf("Input m,n:");
    scanf("%d,%d",&m,&n);
    printf("%d\n",Gcd(m,n));
    return 0;
}
int Gcd(int a,int b)
{
        return a == 0 ? b:Gcd(b%a,a);
}