0_0_4729311_6982.c:1:20: iostream: No such file or directory
0_0_4729311_6982.c:2:19: cstdlib: No such file or directory
0_0_4729311_6982.c:4: error: syntax error before "namespace"
0_0_4729311_6982.c: In function `tongji':
0_0_4729311_6982.c:12: error: 'for' loop initial declaration used outside C99 mode
0_0_4729311_6982.c: In function `main':
0_0_4729311_6982.c:54: error: 'for' loop initial declaration used outside C99 mode
0_0_4729311_6982.c:59: error: redefinition of 'i'
0_0_4729311_6982.c:54: error: previous definition of 'i' was here
0_0_4729311_6982.c:59: error: 'for' loop initial declaration used outside C99 mode
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