千万不能直接输出！

输出法子：

#include<iostream>
using namespace std;
int main(){
cout<<"1 * 1 = 1 "<<endl;
cout<<"1 * 2 = 2 2 * 2 = 4 "<<endl;
cout<<"1 * 3 = 3 2 * 3 = 6 3 * 3 = 9 "<<endl;
cout<<"1 * 4 = 4 2 * 4 = 8 3 * 4 = 12 4 * 4 = 16 "<<endl;
cout<<"1 * 5 = 5 2 * 5 = 10 3 * 5 = 15 4 * 5 = 20 5 * 5 = 25"<<endl; 
cout<<"1 * 6 = 6 2 * 6 = 12 3 * 6 = 18 4 * 6 = 24 5 * 6 = 30 6 * 6 = 36 "<<endl;
cout<<"1 * 7 = 7 2 * 7 = 14 3 * 7 = 21 4 * 7 = 28 5 * 7 = 35 6 * 7 = 42 7 * 7 = 49 "<<endl;
cout<<"1 * 8 = 8 2 * 8 = 16 3 * 8 = 24 4 * 8 = 32 5 * 8 = 40 6 * 8 = 48 7 * 8 = 56 8 * 8 = 64 "<<endl;
cout<<"1 * 9 = 9 2 * 9 = 18 3 * 9 = 27 4 * 9 = 36 5 * 9 = 45 6 * 9 = 54 7 * 9 = 63 8 * 9 = 72 9 * 9 = 81"<<endl;
}

#include<iostream>
using namespace std;
int main(){
cout<<"1 * 1 = 1 "<<endl;
cout<<"1 * 2 = 2 2 * 2 = 4 "<<endl;
cout<<"1 * 3 = 3 2 * 3 = 6 3 * 3 = 9 "<<endl;
cout<<"1 * 4 = 4 2 * 4 = 8 3 * 4 = 12 4 * 4 = 16 "<<endl;
cout<<"1 * 5 = 5 2 * 5 = 10 3 * 5 = 15 4 * 5 = 20 5 * 5 = 25"<<endl;
cout<<"1 * 6 = 6 2 * 6 = 12 3 * 6 = 18 4 * 6 = 24 5 * 6 = 30 6 * 6 = 36 "<<endl;
cout<<"1 * 7 = 7 2 * 7 = 14 3 * 7 = 21 4 * 7 = 28 5 * 7 = 35 6 * 7 = 42 7 * 7 = 49 "<<endl;
cout<<"1 * 8 = 8 2 * 8 = 16 3 * 8 = 24 4 * 8 = 32 5 * 8 = 40 6 * 8 = 48 7 * 8 = 56 8 * 8 = 64 "<<endl;
cout<<"1 * 9 = 9 2 * 9 = 18 3 * 9 = 27 4 * 9 = 36 5 * 9 = 45 6 * 9 = 54 7 * 9 = 63 8 * 9 = 72 9 * 9 = 81"<<endl;
}
太差了！
循环法子：

#include<stdio.h>
int i,j;
int main(){
    for(i=1;i<=9;i++){
        for(j=1;j<=i;j++){
            printf("%d * %d = %d ",j,i,i*j);
        }
        printf("\n");
    }
    return 0;
}

#include<stdio.h>
int i,j;
int main(){
for(i=1;i<=9;i++){
for(j=1;j<=i;j++){
printf("%d * %d = %d ",j,i,i*j);
}
printf("\n");
}
return 0;
}

挺好的！