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#include <stdio.h>
#include <string.h>
char s[80];
int i;
char c;
int main() {
while (1) {
printf("Input a integer:");fflush(stdout);
rewind(stdin);
fgets(s,80,stdin);
if (strlen(s)>10) {
printf("Input too long(>9)!\n");
continue;
}
if (2==sscanf(s,"%d%c",&i,&c)) {
if ('\n'==c) {
printf("%d is a integer.\n",i);
break;
}
}
if ('\n'==s[strlen(s)-1]) s[strlen(s)-1]=0;
printf("\"%s\" is NOT a integer!\n",s);
}
return 0;
}
#include <stdio.h>
char s[]="123 ab 4";
char *p;
int v,n,k;
void main() {
p=s;
while (1) {
k=sscanf(p,"%d%n",&v,&n);
printf("k,v,n=%d,%d,%d\n",k,v,n);
if (1==k) {
p+=n;
} else if (0==k) {
printf("skip char[%c]\n",p[0]);
p++;
} else {//EOF==k
break;
}
}
printf("End.\n");
}
//k,v,n=1,123,3
//k,v,n=0,123,3
//skip char[ ]
//k,v,n=0,123,3
//skip char[a]
//k,v,n=0,123,3
//skip char[b]
//k,v,n=1,4,2
//k,v,n=-1,4,2
//End.