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以下程序的运行结果是。#include main(){char str[]={"1a2b3c"};int i;for (i=0;str[i]!='\0';i++)if (str[i]>='0'&&str[i]<='9')printf("%c",str[i]);printf("\n");}

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以下程序的运行结果是。#include main(){int a[3][3]={1,2,3,4,5,6,7,8,9},i,s=0;for (i=0;i<=2;i++)s=s+a[i][i];printf("s=%d\n",s);}

以下程序的运行结果是。#include void main(){int a[3][3]={1,2,3,4,5,6,7,8,9},i,s=1;for (i=0;i<=2;i++)s=s*a[i][i];printf("s=%d\n",s);}

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