c++常用string函数转载

转载地址：https://blog.csdn.net/weixin_45313447/article/details/114318554?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166856136316800182722804%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=166856136316800182722804&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-2-114318554-null-null.142^v63^control,201^v3^control,213^v2^t3_control2&utm_term=c%2B%2B%E5%A6%82%E4%BD%95%E5%88%A4%E6%96%AD%E6%98%AF%E5%90%A6%E6%98%AF%E5%A4%A7%E5%B0%8F%E5%86%99%E7%9A%84%E5%87%BD%E6%95%B0&spm=1018.2226.3001.4187

原文地址：http://www.cnblogs.com/LQS-blog/p/16894764.html