/in/foo.cc: In function 'int main()':
/in/foo.cc:16:8: error: 'i' was not declared in this scope
    for(i=1;j<=M;i++){
        ^
/in/foo.cc:16:12: error: 'j' was not declared in this scope
    for(i=1;j<=M;i++){
            ^
/in/foo.cc:24:8: error: 'i' was not declared in this scope
    for(i=1;j<=M;i++){
        ^
/in/foo.cc:24:12: error: 'j' was not declared in this scope
    for(i=1;j<=M;i++){
            ^
/in/foo.cc:32:8: error: 'i' was not declared in this scope
    for(i=1;i<=T;i++){         ///第一个人在前面用1 表示
        ^
/in/foo.cc:42:8: error: 'i' was not declared in this scope
    for(i=1;i<T;i++){         ///遍历c
        ^