#include<time.h>
#include<stdlib.h>
int main()
{
int a[10][10],i,j,sum;
srand(time(0));
printf("The array:\n");
for(i=0;i<10;i++)
{ for(j=0;j<10;j++)
{ a[i][j]=rand()%90+10;
printf("%d ",a[i][j]);
}
printf("\n");
}
printf("\n");
for(i=0;i<10;++i)
{ sum=0;
for(j=0;j<10;j++)
sum+=a[j][i];
printf("The sum of col %d is: %d\n",i,sum);
}
return 0;
}追问
编译器里说sum未定义
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