#include<stdio.h>
#define NUM 1
int main(int argc, char *argv[])
{
int counter=1,n=0;
if(argc!=2) { printf("usage: atoi arglist\n"); return -1;}
while(*argv[NUM])
{
if(*argv[NUM]>='0' && *argv[NUM]<='9') { n=10*n+(*argv[NUM]-'0'); *++argv[NUM]; }
else
{ *++argv[NUM]; continue; }
}
printf("number=%d\n",n);
return 0;
}
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