1实验代码
include <stdio.h>
int main(void)
{
int T,n,i,pi,low,k;
int b [i];
scanf ("%d", &T);
for(i=0; i<T; i++){
k=0;
int a[n][n];
scanf("%d", &n);
for (low=0; low<n; low++){
for (pi=0; pi<n; pi++){
scanf ("%d", &a[low][pi]);
}
}
for (low=0;low<n;low++){
for (pi=0;pi<n;pi++){
if(low>pi&&a[low][pi]!=0){
k=1;
}
}
}
b[i]=k;
}
for(i=0;i<T;i++){
if(b[i]==0){
printf("YES
");
}
else{
printf("NO
");
}
}
}
2设计思路
运用2个for循环设计
3运行截图
