c++第六次作业

项目三：矩阵求和

#include<iostream>using namespace std;void main(){const int N=3;int b=1,c=1,i,j,k=0;int a[N][N]={8,4,7,         6,10,9,         12,3,7};for(i=0;i<N;i++){b*=a[i][i];c*=a[k][N-k-1];k++;}cout<<"b="<<b<<"\n"<<"c="<<c<<endl;}

项目四：字符串操作

#include <iostream>#include <cstdio>using namespace std;int main(){    const int n=15;    char a[n]={0},b[n]={0};    int i,j=0;cout<<"请输入字符串1：";gets(b);cout<<"请输入字符串2：";gets(a);for(i=0;i<n;i++){if(b[i]!=a[i]){cout<<"字符串1不等于字符串2"<<endl;j=j+2;break;}elsej++;}if(j==i)cout<<"两字符串相同"<<endl;cout<<b<<a;    return 0;}