c++读取文件及输入到文件的相关问题

错误1. 

fscanf(fi, "%s %i %i %i %i %s", e, &eid, &vstart, &vend, &weight,label);fprintf(fo, "%i\t%i\t%i\n", vstart, vend, weight);

但是一直读出来都是7位负值，每个都不对。

原因：因为源数据的存储就是一个str长串。这样是读不出来数据的。

错误2：

fopen("xxx","rb或者wb")

都应该用fread(),fwrite();而只有“r” "w“ 才能用fscanf(),fprintf(); 

所以最后的代码：

#include<iostream>#include<stdlib.h>#include<stdio.h>#include<string.h>#include<vector>#define MAX_STRING 100using namespace std;vector<string> split(const string &s, const string &seperator) {vector<string> result;typedef string::size_type string_size;string_size i = 0;while (i != s.size()) {//找到字符串中首个不等于分隔符的字母；int flag = 0;while (i != s.size() && flag == 0) {flag = 1;for (string_size x = 0; x < seperator.size(); ++x)if (s[i] == seperator[x]) {++i;flag = 0;break;}}//找到又一个分隔符，将两个分隔符之间的字符串取出；flag = 0;string_size j = i;while (j != s.size() && flag == 0) {for (string_size x = 0; x < seperator.size(); ++x)if (s[j] == seperator[x]) {flag = 1;break;}if (flag == 0)++j;}if (i != j) {result.push_back(s.substr(i, j - i));i = j;}}return result;}int main() {FILE *fi, *fo;string e;int eid, vstart, vend, weight;int a = 1, b = 2, c = 3, d = 4;char str[2 * MAX_STRING + 100];const char *sep = " ";fi = fopen("2015-9-7-11zaolabel.txt", "r");fo = fopen("traffic_network.txt", "w");if (fi == NULL) {printf("Error:network file not exist!\n");system("pause");exit(1);}int num_edges = 0;while (fgets(str, sizeof(str), fi)) { vector<string> v = split(str, " ");vstart = atoi(v[2].c_str());vend = atoi(v[3].c_str());weight = atoi(v[4].c_str());fprintf(fo, "%i\t%i\t%i\n", vstart, vend, weight);num_edges++; }fclose(fi);fclose(fo);return 0;}