（記數問題）：#include<cstdio>#include<cstring>#include<cstdlib>using namespace std;main(){int n,i,j,tot=0,len;char x,s[8];scanf("%d %c",&n,&x);for (i=1;i<=n;i++){ itoa(i,s,10);len=strlen(s);for (j=0;j<=len-1;j++)if (s[j]==x)tot++; }printf("%d",tot);}在Dev-C++上答案正確，可是在tyvj上:評測結果#0: Compile Error (0ms, 0KiB)選手程序編譯失敗 Main.cpp: In function 'int main()': Main.cpp:11:15: error: 'itoa' was not declared in this scope { itoa(i,s,10); ^#1: Compile Error (0ms, 0KiB)#2: Compile Error (0ms, 0KiB)#3: Compile Error (0ms, 0KiB)#4: Compile Error (0ms, 0KiB)#5: Compile Error (0ms, 0KiB)#6: Compile Error (0ms, 0KiB)#7: Compile Error (0ms, 0KiB)#8: Compile Error (0ms, 0KiB)#9: Compile Error (0ms, 0KiB)向各位大神求解?。?！