View Compilation Error

0_0_12302915_28303.cpp:5: error: `_int64' was not declared in this scope
0_0_12302915_28303.cpp:5: error: expected primary-expression before "long"
0_0_12302915_28303.cpp:6: error: initializer expression list treated as compound expression
0_0_12302915_28303.cpp:6: error: expected `,' or `;' before '{' token
0_0_12302915_28303.cpp: In function `int main()':
0_0_12302915_28303.cpp:21: error: `g' undeclared (first use this function)
0_0_12302915_28303.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12302915_28303.cpp:21: error: `gcd' cannot be used as a function
0_0_12302915_28303.cpp:22: error: `l' undeclared (first use this function)
0_0_12302915_28303.cpp:35: error: expected `)' before ';' token
0_0_12302915_28303.cpp:42: error: `qsort' undeclared (first use this function)