#include <stdio.h>
#include <string.h>
 
int main(void)
{
    char pi[] =
    "314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110";
 
    char target[] = "69399";
 
    int i;
 
    for(i = 0; i <= strlen(pi) - strlen(target); i++)
    {
        if(strncmp(&pi[i], target, strlen(target)) == 0)
        {
            printf("見つかりました。\n");
            printf("位置：%d文字目\n", i + 1);
            return 0;
        }
    }
 
    printf("見つかりませんでした。\n");
 
    return 0;
}

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